Favorite Xeric Plant: Gaura

Some call it a butterfly plant. That’s because gaura has delicate, swirly flowers at the ends of long stalks that resemble butterflies. In fact, one variety of gaura (G. lindheimeri) is called ‘Whirling Butterflies.’ It has white flowers; ‘Siskiyou Pink’ blooms have an earthy pink tone. And in 2014, Gaura ‘Sparkle White’ was an All-America Selections National Winner.

Eight stamens jut out from the delicate flower up long stems. No wonder they bring butterflies to mind.
Typically, eight stamens jut out from the delicate flower up long stems. No wonder gauras bring butterflies to mind.

We’re fortunate enough to have wild or native gauras (G. coccinea) in our garden. They appear on their own in late spring and bloom as temperatures warm. They’re a little more like a weed, partly because of the places they tend to appear, and partly because they have a higher foliage-to-flower ratio. Still, I’ll take them, and so will the bees!

Wild gauras have less attractive shape and foliage, but they pop up from seed!
Wild gauras have less attractive shape and foliage, but they pop up from seed!

Drought tolerant gaura

Native gauras appear along roadsides and other dry areas. Many of ours come up through rocks in the garden wall. You don’t have to read a plant tag to know that a plant growing robustly in rocks needs little to no water. We’ve had some trouble with gaura from nurseries, and I believe the reason is that the soil we chose was compacted and holding too much water. Still, if you plant a new gaura, it will need watering until healthy and established. A drip system can give the plant a slow drink.

This flower is from a volunteer gaura.
This flower is from a volunteer gaura.

Easy care

Once you’ve chosen a sandy or loamy soil for your plant, place it where it can get full sun. By the second year, you won’t have to water except maybe once in spring or in severe drought. I really love to place the white flowers where I can see them from a window or patio. It’s also a great plant for breezy areas, holding up to wind, which causes the flowers to “dance.” Most gauras reach about 2.5 to 3 feet tall; the native  varieties are a little shorter.

gaura against rocks
Gauras look terrific in rock gardens and natural designs.

Cut G. lindheimeri back in early spring about halfway down the foliage to keep it bushy, full and not too leggy. I let the native gauras go to seed so they pop up again the next year. You can try the same with nursery varieties; the plant might self-sow if seedheads remain in autumn. The only pests that bother gauras are flea beetles and gardeners who overwater them, especially if the plants are in heavy soil.

Versatile plant

Gauras are hardy in zones 5 through 8. In colder zones, the plant can be damaged if wet when temperatures dip to more than -15 Fahrenheit. Gaura is considered a perennial in those zones, but tends not to last as long as some hardy perennials.

gaura and gaillardia
These volunteer, or native, gauras popped up with volunteer gaillardias. I love the combination.

The gaura can fit into nearly any landscape design. Even before blooming, its slightly mottled leaves provide garden interest. I love to see it against a slightly taller plant with larger, bolder flowers (which also can support the gaura stems as the plant matures). Gaura also is perfect near steps, garden paths and walls. Although gaura fits perfectly in a natural xeric design, its delicate flowers can work in a cottage garden plan, provided it’s not overwatered or has really good drainage. Native gaura foliage and shape is not as stunning, but nonetheless a fun re-seeder in a naturalized xeric garden.

 

 

Purslane and Portulaca

I’ve grown to accept that some invasive plants (aka: weeds) are not so bad. I’m still on the fence with purslane (Portulaca oleracea), a prostrate spreading succulent that can take over entire flower beds.

portulaca flower
Ornamental portulaca from the same family as purslane. Note the ornamental’s thinner, needle-like leaves.

Weed or edible?

Purslane can grow in pavement, between rocks, and in moist conditions. It spreads from seed or from pieces of stems. And a purslane can have more than 50,000 seeds per plant. It re-roots after being hoed. That’s a weed, right? Still, many value purslane because it is edible. But in my mind, if the plant interferes with the objectives in managing a lawn or garden, it’s a weed. And since mats of purslane suck moisture and nutrients from soil and even shade soil from sun as they spread, they’re pretty much weeds in my book. That’s especially true in a vegetable garden, where I don’t want a weed competing for precious water.

purslane weed
Purslane taking over a rock garden. It’s best to pull it up before it gets this big, whether you eat it or throw it out.

Purslane was grown in India originally and provided nutrition and reported health benefits. Those who eat purslane have described its taste as lemony or similar to spinach. And the plant tastes best if “harvested” while its fleshy leaves still are young. So one way to eradicate common purslane where you don’t like it is to follow the philosophy “If you can’t beat ‘em, eat ‘em.”

You can spot common purslane as a small seedling with reddish-tinged leaves that form flat against the ground and spread out like spokes in a wheel. Pull it up before it sets seed to avoid having an entire bed full of the weed the next year. Not sure a weed is purslane? Check out these photos of seedlings and other stages of purslane from Missouri State University.

Ornamental value

Even common purslane can be pretty. The fleshy leaves contrast nicely with tiny, usually orange, flowers. And I bought one years ago before I knew better. I paid for that, because the plant came back with a vengeance, choking out other plants in a tiny rock garden. So if you choose to actually plant purslane as an edible, just beware that you’re introducing the seeds to your landscape.

heat loving drought tolerant portulaca
Portulaca is a great container plant. Use one color or mix many. The plant spreads and cascades slightly over the edge.

A better alternative is an ornamental portulaca such as P. grandiflora. You can tell an ornamental portulaca from a purslane by its leaves. Ornamental portulaca, often called moss rose, has more needle-like leaves than purslane foliage. The flowers also are showier, often looking either like a cactus bloom or a tiny carnation or rose. The best part? They love sun and heat, are highly drought tolerant, and will spread in warm climates to make an interesting groundcover. They’re also a perfect container plant, especially if you buy a mix of colors, which warm-climate nurseries usually carry. Both purslane and portulaca bloom in the morning after the sun has been up a few hours, and close later in the day.

Portulaca just planted in the ground. I hope they will cascade over these rocks and pavers and re-seed next year.
Portulaca just planted in the ground. I hope they will cascade over these rocks and pavers and re-seed next year.

Caring for portulacas

Portulaca is an annual, but can re-seed. Although not nearly as invasive as its purslane relative, an ornamental portulaca often pops up somewhere in the landscape. But to me, it’s a happy surprise. The easy-care, drought tolerant annual is welcome in our garden any time temperatures begin to warm up in early summer.

portulaca in hanging baskets
Portulaca actually do better with sun and heat, but who would have thought it would be 40 degrees F in mid-May? I can’t wait for these containers at the back of our garden to fill in.

Portulaca will keep blooming and spreading into fall, provided you do one thing: pinch off spent blooms. If you let most of the faded blooms remain on the stem, the plant can become leggy, plus it won’t bloom as often. The equivalent of deadheading this annual is so simple; just pinch the blooms off into your hand after they have closed up and begun to look withered. If the flower resists, wait a day. You’ll soon recognize the difference between a bud and a spent bloom.

portulaca and cactus
This portulaca re-seeded in some soil we repurposed for one of Tim’s cacti. It just goes to show how little water they need! You can see the bloom stages really well in this photo. A tiny dried-up flower peeks from behind the bloom; it’s ready to pinch off! Two new buds are a little lower on either side of the stem. And a faded bloom, nearly ready to pinch, lies at the lower right.

And if you want to pinch your portulaca while eating a salad with purslane leaves, that’s up to you. Just be armed with new recipes to cook up all of your purslane in years that follow.

Want Easy Garden Maintenance? Go Native!

There are so many “right” reasons to choose native plants: They need less water and often attract pollinators. But if you need an even better reason, one that appeals to you in your busy world, how about the fact that they’re easier to maintain?

Think about it. By nature (hmmm, native and nature), native plants grow in the open, such as in forests or plains. Away from people, the plants can survive no matter the rainfall or other weather problems. And many reseed to ensure continued survival. They can do all of this without a nice lady in a funny hat and brightly colored gloves “tending” to them.

Paperflower
This paperflower (Psilostrophe) came up in the rocks near our creeping broom for nice succession blooming.

Why native plants are easy care

Once a plant native to your region is established, which can take up to a year, it should need little to no watering. And it should never need fertilizer or other chemicals. These plants have adapted to their native conditions and are less susceptible to pests and diseases than non-native plants. As long as the plant is in the right spot in terms of sun, soil and climate, all you need as a gardener is a little patience. Don’t amend the soil or overwater your new native (although they need more water in the first year to help the roots establish). Your native might not flower prolifically in its first year, and wildflower seeds can remain dormant in the ground before suddenly popping up when conditions favor their germination and growth.

native rock rose
Rock rose (Helianthemum) is an easy-care native plant and a stunner.

Of course, just because a plant is listed as “native,” if you plop it down in completely different conditions or climate, the plant might not make it or could turn out to be as much work as a big-box store purchase. For example, the Teddy Bear Cholla (Opuntia bigelovii) is listed as a native plant in New Mexico. But it grows naturally at elevations of 100 to 5,000 feet. And elevation makes a big difference in the Southwest. We’re at 6,300 feet, and our nights can easily dip below the 22 degrees F listed for warmer Sunset zones that support the cholla (zones that are less than an hour away to the east or west). Likewise, planting a cholla in a bed with drip or spray irrigation could damage the plant more than cold. It prefers low water, full sun and sandy soil. No wonder it does so well in the deserts of New Mexico and Arizona!

Tiny daisies are a favorite wildflower. I believe these are whiplash daisies.
Tiny daisies are a favorite wildflower. I believe these are whiplash daisies.

How to select native plants

So caring for native plants is easy, but since so much depends on plant choice and placement, how can you make that process easier? Here are a few ideas:

  • Notice plants you see and love in the lawns of neighbors, commercial buildings and even along roadways or on nearby hikes (but don’t steal native plants in the wild). Take photos to help with identification and note where and when you saw the plant.
native wildflowers New Mexico
Daisies, shrubby ice plant, a native gaura forming (and weeds).
  • Although I said to select plants native to your region, plants native to nearly the same conditions also do well. Several cold-hardy natives of South Africa, such as Red Hot Poker (Kniphofia) and Hardy Purple or Yellow Iceplant (Delosperma) do really well in the mountainous Southwest.
shrubby ice plant
Here’s a close-up of the shrubby ice plant. Its flowers are smaller than the spreading types, but just as bright. And it’s a compact choice for rock gardens.
  • Local books and apps are the best source for identifying the plants you see near your home. Some national sites (such as the Lady Bird Johnson Wildflower Center) have accurate search engines, but others can confuse you if your search brings up a low-growing shrub with purple flowers that only grows in Georgia.
Wild verbena and even wilder alyssum.
Wild verbena and even wilder alyssum.
  • Get help from professionals. Local landscape designers know native plants, and should encourage their use. Call your master gardener hotline or check with a local extension office or native plant organization to get help identifying and selecting plants for your area.
daisy native agastache
Native daisy that needs only shearing of flower stems after fading, and an agastache, which brings hummingbirds.
  • If you can’t identify a plant but have it in your garden, try not to stress. We’ve got several plants we have yet to clearly identify, but we’ve watched their natural patterns of growth and blooming and just played along. In most cases, I only shear off spent flower stalks in early spring to reinvigorate the plant.
I still haven't figured out this pretty spring bloomer in a mounding form. If anyone knows, please comment!
I still haven’t figured out this pretty spring bloomer in a mounding form. If anyone knows, please comment!

And if you have a native you really love and want to use elsewhere in your lawn, try saving seeds, propagating a cutting or dividing the plant. See the Resources page for a list of native plant lists or nurseries.

 

 

5 Low-water Plants that Love Shade

Usually, sun and heat are more trouble in the Southwest than shade. But sometimes, you want to plant flowers or vines under a tree or have a shady spot near the house that needs plants!

Plenty of plants that tolerate low light and low water work well on covered patios, north-facing walls or under trees. Here are a few choices that grow well in the Southwest.

Columbine growing in shade on north side of house zone 6B New Mexico
Columbine blooms are so delicate and interesting. It’s a favorite!

Columbine (Aquilegia) is a stunning native. The Rocky Mountain columbine is state flower or Colorado, and that’s fitting since it grows naturally in the stippled shade of trees at high altitudes (6,000 to 10,000 feet). The Rocky Mountain columbine has a two-toned flower with bluish purple outer petals and white petals in the center. Planting columbine under a tree usually works well in high deserts and intermountain areas of the West unless the soil drains poorly. The best part? It’s perennial, and should come back every year; it also will re-seed nearby. There are plenty of colors and varieties of monotone and two-toned columbine. The plant can get powdery mildew when it’s especially rainy with warm days and cool nights.

Bonfire begonia in container.
This is a fibrous begonia called a Bonfire, with more of a tubular flower. I love it in this hanging basket. Image courtesy of Tesselaar.

Begonia is an easy-care ornamental for shade. Although some varieties are perennial in areas of the Southwest nighttime temperatures stay above 32 degrees, it’s an annual in mountain regions. I used to arrange waxy begonias in a container for a shady area of my front porch. They would bloom all summer and into fall with pretty little salmon, white or pink flowers. And they need no trimming or deadheading. Begonias need a little more moisture than some annuals, and mulching around the plants (but not all the way up to a tree trunk) should help them stay moist under a canopy. They’re super easy container plants for shade with no disease or insect problems.

ajuga in zone 6B shade
Ajuga, or carpet bugleweed, grows in nearly all shade on the north side of our home. It’s easy to care for!

Ajuga, also called carpet bugleweed (Ajuga reptans), is a great groundcover for shady areas. The plant has shiny bronze or rust-colored leaves, and it spreads by runners. Ajuga plants can be spaced about six or more inches apart, but they spread to eventually provide a mat of leaves. Even better, they’ll shoot up purple flower spikes in summer. Depending on the type, ajuga should be hardy in zones 3 through 9. Ours survives – and has spread – in a mostly shady area on the north side of our home in zone 6B, and with only one or two deep waterings a year. If you plant them where they’ll get water from sprinklers, they can become invasive.

Heuchera coral bells
Our Heuchera is just emerging from winter dormancy. The leaves already have the telltale shape and color of this shade lover.

Coral bells (Heuchera) is another shade lover with spikes that shoot up in summer with flowers, typically a pinkish red (or coral!).  The leaves are a distinctive ruffled shape. Coral bells need a little more sun than some of the other plants I’ve mentioned, so they wouldn’t do as well near the base of a large tree. But place coral bells in partial shade, such as where the shadow of the house shades a bed in peak afternoon heat. They are drought tolerant and hardy down to zone 4. Huecheras are susceptible to several diseases and pests, including mold or leaf spot. All the more reason to give them a mix of shade and sun, along with air flow (in other words, plant them in front of a structure but not too closely or too crowded).

cobra apricot vinca
Periwinkle, or vinca, has pretty button-like flowers on glossy, slender leaves. This one is Cobra Apricot. Image courtesy of the National Garden Bureau.

Vinca comes in so many bloom colors, which makes it a great choice for a shady container or to plant beneath a tree or bush to complement flower or foliage colors. My mother used to grow lots of vinca, or periwinkle, in the South and in Arizona. Many vinca minor plants are perennial, but the hardiness varies by species. Where perennial, they make a great groundcover in shade as the plant’s trailing stems take root. In those cases, the leaves are evergreen in dark, glossy green or variegated patterns. Shearing the plants every so often stimulates new growth. I’ve grown annual varieties in containers that get part sun and part shade.

When trying a shade lover for the first time, you can always choose a container planting. It helps you get to know the sun, shade and water requirements of a plant. And when planting under trees, be especially careful not to harm the tree’s roots. Learn more about planting under trees in this great handout from the University of Minnesota Extension Service, which I learned about in a recent #plantchat on Twitter.

Favorite Tree: Redbud

It’s not the plant you typically think of when considering trees for a waterwise landscape. But redbuds (Cercis species) can do quite well in areas of New Mexico, Texas and Oklahoma. The tree is native to New Mexico and states east and northeast of us, along with Quebec.

redbud in low water garden
In early April, the redbud is saturated with bright pink-purple flowers.

Even though the redbud produces gorgeous purplish-pink flowers and large, heart-shaped leaves, it’s a low to moderate water user. We only irrigate ours once or twice a year, and rely on rain or snow for the rest of its water.

redbud blooms New Mexico
Redbud blooms signal spring and bring some bees to the garden.

Multiple choice

There are numerous choices of redbud varieties, and gardeners are bound to find one that grows in their zone and soil conditions. The most well-known variety is the Eastern redbud (C. canadensis) but a few types, such as the Mexican redbud (C. mexicana), have multiple trunks. The Oklahoma redbud (C. reniformis) grows more slowly than the Eastern, but has round, glossy leaves. All are fairly small as trees go, reaching no more than 25 or 30 feet in height and width.

redbud in xeric garden
Buds first emerging in spring. This redbud complements other plants in our xeric garden.

I’m pretty certain ours is a typical Eastern redbud because of its single trunk and more matte than glossy leaves. It’s possible that the former owners of our place, who planted this stunner, trained a multitrunk variety as a single trunk. But I’m pretty certain it’s Eastern and the growth is maintained by lower water application and Tim’s trimming. I’m open to correction, though it really doesn’t matter to me. I love this tree!

redbud leaves
Large, heart-shaped leaves look awesome in summer and as fall begins to turn them yellow and then bronze.

Multiple uses

I’d grow this tree for the spring and fall color alone. It’s perfect for a xeric landscape because it gets by on so little water and grows slowly. The shrubby varieties probably look more natural, but with a rounded canopy, the Eastern redbud can provide shade and color. I’ll admit that ours is a bit low; we have to duck under the lower branches. But it also works well for a bird house and feeder. I can reach it fine, but the birds feel protected.

redbud and red bird house
Birds love our redbud, which is the tallest plant in our garden.

Redbuds send their roots deep into the ground, which makes them less likely to run under sidewalks or around sewer pipes. That gives you more choices for planting the tree near your house. In a southern location, the tree gets plenty of sun and can shade a portion of the garden or your home. Since it drops all of its leaves in winter, it won’t block warming rays of sun. Bees also love the spring flowers.

Caring for redbuds

If you want to train a shrubby redbud into a single trunk, cut out the weaker stems early in summer. Too much salt can lead to leggy growth of immature redbuds. The tree, which is a member of the legume family, is susceptible to several insects, including white peach scale, white flannel moth and several caterpillars, including stinging ones. A few years ago, Tim spotted some bare branches and found them covered with stinging caterpillars (see a photo of one in our Chinese pistache in this post).

In the Southeast, redbuds are vulnerable to Botryosphaeria canker. The disease can cause branches to split, die back and turn brown. Fungal diseases on redbuds are less likely in our arid climate, except maybe if the tree is too close to a structure or other trees to have adequate air flow. Ours has a splitting branch, but I’m guessing it’s from cold damage or a combination of cold and weight. And there is plenty of new growth on the stems.

split in redbud branch
We just noticed the split in this large branch this winter, but it looks healthy otherwise.

Redbuds prefer full sun and most varieties can survive in zones 5 through 8. You can prune a redbud for shape while the tree is dormant in winter, but it might cause fewer blooms. It’s probably best to prune just after spring flowers fade.

Native, waterwise, good for shade, multiseason color and easy care. What’s not to love about the redbud? Learn more about redbud care and problems in this excellent publication from Clemson University.

Plant Select 2016: Waterwise Grass and Groundcovers

I get so excited when I see the Plant Select press release in my messages each spring. I love any new plant introduction or award winner, but Plant Select focuses on plants that adapt to – and thrive in – the dry, wild conditions of the intermountain regions and high plains. Gardeners can be confident that their selections will work in much of New Mexico, Arizona, Colorado and other western states. This year, Plant Select announced two new groundcovers, and selected a drought-tolerant turf and groundcover. Anyone ready to switch out a high-water lawn should take note of these choices:

new ice plant orange flowers
Red Mountain Flame ice plant. All the pluses of an evergreen ice plant, plus a new orange tone! Image courtesy of Plant Select and David Salman.

Red Mountain Flame ice plant (Delosperma ‘PWWG02S’). An ice plant with deep orange to red flowers! Ice plants came to the U.S. from South Africa. The plants use little to moderate water once established, yet they provide gorgeous, evergreen groundcover for the xeric garden. One reason is that they spread quickly. But ice plants won’t get invasive. When ours have spread too far, we’ve even transplanted some of the extra plant to another area of the garden with success. They’re usually yellow or pale pink to purple. I’m thrilled to have a new ice plant color choice for rock gardens and other beds. It’s also perfect that New Mexico’s own David Salman of Waterwise Gardening produced the Red Mountain Flame seedlings. Grow ice plant in zones 4 through 9. Red Mountain Flame needs a mix of sun and shade.

Alan's Apricot ice plant
Alan’s Apricot ice plant boasts larger, color-changing blooms. Image courtesy of Plant Select and Alan Tower.

Alan’s Apricot ice plant (Delosperma ‘Alan’s Apricot’PPAF). The apricot-colored blooms of this new introduction are similar in color to existing ice plants, but larger. It also changes color to a pinker hue and then back again. Ice plants turn heads in summer when they fill with blooms on the low foliage. I can only imagine how Alan’s Apricot’s two-inch blooms will look in mid-summer. The larger, showy flowers also will shine in a container or the landscape as blooms begin to open or close each season. The ice plant was developed by Alan Tower of Spokane, Wash. Also for zones 4 through 9, a variety of soils, and a mix of sun and shade.

Moroccan pincushion
The Moroccan pincushion is a great groundcover selection for rock gardens. Courtesy of Pat Hayward at Plant Select.

Moroccan pinchusion flower (Pterocephalus depressus). The Moroccan pincushion has similar foliage and an inch or so more height than ice plants. The pincushion flowers are light pink to rose in color and leave silvery seed heads after fading. It’s also evergreen, offering winter foliage in zones 4 through 8. Add Moroccan pincushion to a rock garden, raised bed or large container in full sun. The plant needs little to no water once established and should have soil that drains well.

dog tuff grass
Dogs can run on and water drought-tolerant DOG TUFF without damaging the grass. Image from Plant Select and Kelly Grummons.

DOG TUFF grass (Cynodon ‘PWIN04S’).  Why have no lawn at all when you can have areas of turf for kids and pets, along with the look and cooling effects of grass? I’m all for removing some lawn, even more if you have a high-water grass. But I’ll never stop trying to convince people to leave a little grass. DOG TUFF lets homeowners have the best of both worlds: saving water and keeping a lawn. DOG TUFF has an extra quality that might have influenced Plant Select’s choice. Like the name says, it’s tough, holding up to foot traffic even in a xeric lawn. It also holds up to your dog’s help with “watering.” The grass comes in plugs for easier spread and planting. DOG TUFF needs more water the first year, but once established, the warm season grass should return in late spring for all-summer coverage in zones 5 through 10. Learn more about planting and caring for DOG TUFF here.

Plant Select is located in Ft. Collins, Colo., where its staff puts plants to work in test gardens to see how they do with little water. Plant Select also evaluates plants for adaptability, durability and ease of care. They also consider how attractive the plant is in the garden and whether it’s wildlife friendly.

Drought-tolerant Flowers for Cutting

It’s easy to have color in a low-water garden, but many xeric flowers and shrubs have stems too short or otherwise look better in your yard than in a vase. We’re trying to turn an area of our lawn into a small wildflower meadow, and I’ve been considering growing some flowers for cutting, maybe even to sell at Farmers’ Markets. But I don’t want to pour too much water to flowers, especially annuals.

The folks at ProFlowers made it easier for me to find drought-tolerant flowers that also work well for cutting, with their guide on the 151 most common flower types in the U.S. I’m featuring five favorites from the list that use little water and can glam up a floral arrangement:

purple coneflower
Coneflowers make striking cut flowers and attract pollinators to your garden.

Coneflower (Echinacea). This is one of our favorite flowers, and we’d have one in our garden right now if a gopher had not destroyed the transplants we purchased at a local nursery. These are versatile flowers, tolerating both heat and drought, and growing in zones 3 through 9. They’re also gorgeous; coneflowers are in the daisy family, and I love how the rounded stamen, or center, rises above the petals. And it comes in many colors, including the traditional purple, along with yellow, white, raspberry and even in a mix with oranges and yellow that remind me of zinnias. Echinacea also is a popular herb, and Native Americans have long used the plant’s extract to treat wounds and infections.

Hyssop. This is another herb that uses little water and makes great cuttings. It’s called the “holy herb” for its purging or cleansing properties and the oil has aromatherapy uses. A member of the mint family, hyssop loves heat, but grows in zones 3 through 10. It’s deer resistant and drought tolerant. Pollinators love hyssop, so be sure to leave a few blooms on the plant. Hyssop is a perennial, and is evergreen or semi-evergreen in most zones. Most varieties produce mid-summer and late summer blooms in purple, blue, pink or white.

hyssop purple
Hyssop blooms in summer, attracting pollinators.

Marigold. Although these members of the Asteracea family don’t have the long stems of many cut flowers, they’re an easy, dependable and attractive annual. Most varieties come in yellow and orange. Technically not a drought-tolerant plant, marigold still thrives in well-drained soil in full sun from zones 2 through 10. To save water, I add marigolds to tomato plants or other areas of my vegetable garden. It’s said that their aroma can help deter insects. Pinching off the first few flowers before opening can help the plant produce more flowers for cutting.

marigold flower
Marigold blooms have such rich color and require only deadheading, or pinching spent blooms, to keep the blossoms coming.

Nasturtium. This tough flower does well in heat and poor, dry soil, and it’s edible. I love to see nasturtiums in containers, where the flowers drape over the sides. They’re easy to grow from seed, so that makes them affordable too! And the large seeds are easy to handle and space, so this is a great flower to have children help plant and then harvest. Although listed in zones 9 through 11, we’ve grown the flowers in zone 6B after summer warms up.

nasturtiums in washer planter
We went a little wild with nasturtium seeds in this antique washer. But I love the results!

Sea lavender (Limonium). I’ve never grown this pretty blue flower, although I love lavender. Maybe that’s because it prefers sandy soil that drains quickly and is a favorite of seaside areas. It’s not from the lavender family, but like lavender, Limonium does well in drier soils and drought conditions. The plant attracts birds and butterflies, and is easy to care for. Check with local nurseries or master gardeners to find the best variety for your zone, especially if you want to keep the plant as a perennial.

sea lavender
Sea lavender flowers are especially good at retaining color after cutting.

I’d like to add a few other flowers from the ProFlowers guide that might have had one or both qualities (drought tolerant and good for cutting). We’ve grown some in our zone 6B rock garden with success. Among those are coreopsis and cosmos for cutting, and four o-clocks (Mirabilis) and periwinkle for low-water garden color.

The Dirt on Saving Water in the Garden: Good Soil

Gardeners can take many steps to save water, such as saving rain water and using drip irrigation. But one of the most crucial steps lies beneath our feet, in the soil that protects and nourishes roots and controls water drainage and aeration.

black sand beach Maui
Black sand in Maui along Hana Highway. The black sand is made from lava rock.

What you can’t see: soil microbes

Tiny microbes feed soil and plants, relying largely on humus, the rich organic matter that results from decay of natural materials. When conditions are right, insects, earthworms and microorganisms in healthy soil create humus. Organic matter in the soil ensures that microbes thrive and the soil drains as it should. And when a plant is otherwise healthy, it’s less vulnerable to diseases and can likely survive with less water. In Master Gardener training, I learned that New Mexico soils have organic matter of 20 percent or lower on average. At our place, rocks take up 90 percent of the soil (slight exaggeration). We located our vegetable garden in an area that used to be part of an apple orchard and that’s near the river. The soil is much better than near the house, likely because of organic matter working its way into the soil over the years.

xeric rock garden
Got rocks? We’re certain the rock garden walls and borders were made with rocks excavated on our land! Many of the native and xeric plants have adapted to soil conditions.

Xeric plants and soil drainage

The thing is, many xeric plants are more affected by soil that remains wet than by lack of water. Lavender comes to mind; wet feet can cause root rot. Add a sudden drop in temperature to the dampness and lavender plants are at risk of dying. I’m seriously worried about ours after 18 inches of snow. Plant care instructions for nearly all xeric plants read “place in well-draining soil” because too much water in the soil suffocates a plant’s roots. Sand dries too quickly, but clay and compacted soils fail to drain.

Lavender does better with well-draining soil and less water.
Lavender does better with well-draining soil and less water.

Plants use valuable energy to pull moisture from soil. When they have to work harder to access water in soil, plants become stressed and wilt. If your soil drains quickly, you have to water more often and less deeply. Loam is the name used for balanced soil that has a fairly even mix of sand, clay and silt. As mentioned, clay soils hold too much water. Amending either extreme (sand or clay) with organic matter helps plants access the appropriate amount of water needed with less stress. Instead of adding sand or clay to balance soil, gardeners should use organic matter to gradually improve soil health and function.

This soil at the entrance to our vegetable garden is compacted foot traffic. Notice how water from snow melt stands in the soil.
This soil at the entrance to our vegetable garden is compacted from foot traffic. Notice how water from snow melt stands in the soil.
Only a few feet away is this raised bed with organic matter added. No standing water under the same conditions; the water is working its way down through the soil.
Only a few feet away is this raised bed with organic matter added. No standing water under the same conditions; the water is working its way down through the soil (and rocks).

Here are a few tips for ensuring your plants’ soil is healthy, providing nutrients, water drainage and oxygen to roots:

Add organic matter. The type of matter you add is more specific to your soil’s pH and other factors. But most natural organic amendments, such as manure or green manure, can help.  Also called cover crops, green manure is the purposeful planting in fall and winter of crops that restore soil nitrogen and organic matter used up by summer plants. When using animal manure, add it to compost or make sure it’s cooked completely; don’t add fresh manure to growing plants.

You can see the difference in the color and texture of the mushroom compost that sits on top of the summer vegetable bed. The soil needs some help.
You can see the difference in the color and texture of the mushroom compost that sits on top of the summer vegetable bed. The soil needs organic matter from the compost and some broken-up plant residue.

Properly handle plant residue. Although some schools of thought are in favor of letting spent plant material stay on the ground to decay and provide organic matter, gardeners should use caution. Insects overwinter in plant residue on the ground (good if you want monarchs, but you can’t really go around selecting which insects get to take up residence). And it’s never a good idea to use diseased plant material. We kept some healthy plant material, but anything that looks funky goes into compost bins or garbage. We don’t mess with “wilder” areas around the property.

An unripe pear and leaf material remain under a large, old pear tree. They'll compost and improve soil, but also attract ants and other insects.
An unripe pear and leaf material remain under a large, old pear tree. They’ll compost and improve soil, but also attract ants and other insects.

Use organic mulches. Adding mulch around (but not against) the base of the plant helps slow water evaporation from the soil. Organic mulches eventually break down, improving soil make-up.

Here at the Los Angeles County Arboretum and Botanic Garden, landscapers have added mulch around many beds, including blue fescue.
At the Los Angeles County Arboretum and Botanic Garden, landscapers have added mulch around around many plants, including blue fescue.
Cacti at the Arizona-Sonora Desert Museum in Tucson, Ariz. need no mulch!
Cacti at the Arizona-Sonora Desert Museum in Tucson, Ariz. need no mulch!

Rotate crops and use cover crops. In vegetable and herb gardening, move annual crops around so that the soil nutrients get a break. Families of plants differ in how they use soil nutrients.

Stop tilling. Rototilling, the traditional farm method, burns off carbon and adds to weed emergence. It also breaks soil up into smaller particles, which makes it less permeable for air and water. Repeated tilling leads to loose top soil. Heard about the Dust Bowl? Work added organic matter into the top few inches only, or let it sit on top of soil.

When in doubt, test your soil to determine how much of it is sand, clay or loam. You can perform your own home test pretty easily using a mason jar, as described on page 11 of this publication from the San Diego County Water Authority.

 

Five Low-water Flowering Plants for 2016

You can save water in the garden without sacrificing color. And several new or hot plants for 2016 pop with color, even though they’re waterwise or drought tolerant. I’m so pleased that breeders and nurseries are beginning to focus on more low-water choices for gardeners.

salvia little kiss
Little Kiss Salvia packs bicolored blooms and low-water, low-maintenance needs. Image courtesy of Sunset Western Garden Collection.

A few of the new and hot plants I’m covering are hardy enough to survive high desert or intermountain winters, such as our zone 6B. I’ve listed five favorites for various zones below. Check out my past post on new drought-tolerant plants and watch for more introductions as spring approaches.

‘Little Kiss’ Salvia (Salvia micropylla ‘Little Kiss). All salvias are striking and perfect for low-water gardens. This new salvia from the Sunset Western Garden Collection has bicolor blooms. The red and white blooms (pictured above) appear from spring to fall, and the evergreen leaves provide some winter color. Little Kiss is hardy to 10 degrees F, thriving in zones 8 through 10. The plant grows quickly, and can be shaped once it’s established and actively growing. The salvia should only reach a height and width of about 18 inches. Use the low-growing showy plant along borders, steps or rocks. I might have to try one in a container!

Baby Pete Lily of the Nile (Agapanthus praecox ssp. orientalis ‘Benfran’). Monrovia declares Baby Pete to be one of its hot plants for 2016. The plant from Australia blooms earlier than most Agapanthus varieties and continues blooming with pretty lilac-blue flowers. This is a dwarf compact Agapanthus with short foliage that reaches about 12 inches high, with the purple blooms rising on stems above it. It’s a perennial in zones 8 through 11, or a container plant for cooler zones. Monrovia also has a Lily of the Nile (Midknight Blue) that’s hardy down to zone 6.

Baby-Pete is a compact, low-water Lily of the Nile with lots of bluish-lavender blooms. Image Credit: Doreen Wynja for Monrovia.
Baby-Pete is a compact, low-water Lily of the Nile with lots of bluish-lavender blooms. Image Credit: Doreen Wynja for Monrovia.

Summer Skies Butterfly Bush (Buddleia ‘Summer Skies’). Butterfly bush gets a bad rap because the plant is considered invasive in a few states in the Northwest. And it’s not a native plant in the United States. Still, in the right conditions, the perennial shrub that attracts butterflies and hummingbirds is a perfect low-water plant. Those conditions include well-draining soil, little irrigation and full sun. Its striking, tubular flowers and easy maintenance make it a centerpiece of one of our garden beds. This winter, birds are landing in it for temporary shelter. Proven Winners has given me another reason to love buddleia with Summer Skies, which adds gorgeous variegated leaves to its bluish-purple blooms. The plant is hardy in zones 5A through 9B.

Proven Winners summer skies butterfly bush
Gorgeous leaves, large purple blooms and little water! Plus hummingbirds and butterflies. Summer Skies butterfly bush can be the centerpiece of any xeric garden. Image courtesy of Proven Winners.

Scarlet Torch Bottlebrush (Callistemon rigidus ‘RutCall’). The bottlebrush is a favorite of hummingbirds too, with its bright crimson flowers through most of late spring and summer. The Scarlet Touch Bottlebrush from Monrovia is a compact variety that requires little maintenance. It typically needs little to no pruning and requires little water once established. Still, it can grow to nearly 9 feet high and 12 feet wide over several years. The plant is evergreen and hardy in zones 8 through 11 and flowers best in full sun.

I love the red blooms of this Scarlet Torch bottlebrush. Image Credit: Doreen Wynja for Monrovia.
I love the red blooms of this Scarlet Torch bottlebrush. Image Credit: Doreen Wynja for Monrovia.

Rose (Showy Pink) Milkweed (Asclcepias incarnata). Attracting butterflies and hummingbirds is the desire of most gardeners. Milkweeds provide essential food for Monarch butterflies to help maintain or increase their population. This pink milkweed is from my favorite local source, High Country Gardens, and is on our list of additions in Spring 2016. Although not as waterwise as some, the plant certainly has a place in the xeric garden. Aside from its pollinator value, milkweed can thrive in areas of the yard or garden where water gathers. It’s also called Swamp Milkweed for that reason. If you’re considering a rain garden or bioswale, this is the plant to add alongside native ornamental grasses. We’ll plant ours along an abandoned irrigation ditch that runs midway through our property. Rose Milkweed is hardy from zones 3 through 9 and is deer resistant. The plant prefers full sun and will grow to about 3 feet wide by 3 or 4 feet tall.

milkweed
The Rose Milkweed adds color to drainage areas of the xeric garden and feeds monarch butterflies. Image Courtesy of High Country Gardens.

Save Water by Growing Food: How to Add Edibles to a Low-water Garden

Growing edibles can be a smart xeric strategy, especially for anyone looking to begin a garden or use less water in the lawn and garden. Many edibles are attractive and some are evergreen. If you live in an arid zone, applying more water to edibles than to ornamental plants is the right thing to do. Here are a few strategies for making your lawn and garden attractive while saving water and helping to feed your family.

container edibles
Tomato and rosemary make gorgeous edible container plants, especially interspersed with herbs and flowering plants.

Grow perennial herbs and vegetables

Luckily, several delicious and useful perennial herbs require little water. My favorites are rosemary, sage, lavender and thyme. All of these plants thrive in our xeric garden at zone 6B, and many are hardy to even colder temperatures. Providing well-drained soil helps these herbs survive; some of the only diseases that attack them are related to prolonged wet roots or poor air circulation around wet leaves. Other useful perennial herbs for the xeric garden include bee balm, yarrow and oregano.

Lavender is one of the prettiest xeric herbs. Use it in recipes, to make gifts, or to attract pollinators to your garden.
Lavender is one of the prettiest xeric herbs. Use it in recipes, to make gifts, or to attract pollinators to your garden.

Once you’ve mastered a successful season growing food, consider a perennial vegetable such as asparagus. One plant can survive for more than a decade. Growing asparagus requires some patience until the plant produces and a commitment, but harvesting fresh asparagus for several years would be worth it. Although the vegetable requires more water than some for the first few years, you’re likely to use less water over the life of the plant than you would by planting a crop of zucchini or other vegetable year after year. Asparagus is hardy in zones 3 to 8. Some spears showed up along our ditch bank last year. They were leggy, but the plants have survived several winters with no irrigation or other effort on part, since we didn’t know about them. Here’s an article from Gardener’s Supply Company on how to grow asparagus.

This apricot looks beautiful all year long and shades parts of the house, patio and garden, even though frost has kept it from producing fruit for a few years.
This apricot looks beautiful all year long and shades parts of the house, patio and garden, even though frost has kept it from producing fruit for a few years.

Shade with trees that produce food

Shade is a must for lawns in hot, dry climates. If you’re going to plant a shade tree, why not choose one that produces food? I believe that fruit trees get a bad rap as being “messy.” It takes less time to harvest from the trees or pick up dropped fruit every few days than it takes some of us to make a grocery trip! Enjoy the shade of an apricot or apple tree and delicious, fresh fruit in summer, depending on the year’s frost. Fruit trees also have beautiful spring color and attract pollinators. Some nut trees thrive in warm climates.

We had to climb ladders and compete with birds for our tart cherries this summer, but they were worth it.
We had to climb ladders and compete with birds for our tart cherries this summer, but they were worth it.

Dwarf fruit trees provide less shade, but use less water and space and produce a more reasonable amount of fruit. Busy working parents likely will appreciate that dwarf fruit trees entail less work than full-sized ones in an abundant year. Dwarf trees require less climbing and pruning, and often produce fruit earlier than their larger counterparts. A single dwarf tree that requires no companion for pollination can add a little shade, color and interest to a xeric lawn or garden. Just be sure to choose a variety hardy for your zone. Many dwarf pears, plums and apples are hardy to zone 5; Stark Bro’s helps you choose a dwarf variety based on your zone. Mulching around the tree can reduce water needs.

Use shade for other edibles

Trees provide shade for people and plants. Take advantage of shade to grow edible crops under trees, shrubs or other vegetables. Many herbs and vegetables tolerate partial shade or grow best during cooler weather. Planting basil where it gets afternoon shade can help the plant thrive and use less water. Just be sure to estimate where the shade will be come the height of summer, not where it is when you plant.

These containers grew short-season tomatoes, basil and marigolds. We could move them to adjust to shade, then back into more sun as late summer shadows shifted.
These containers grew short-season tomatoes, basil and marigolds. We could move them to adjust to shade, then back into more sun as late summer shadows shifted.

Planting edibles in containers is a smart water choice and can give the gardener more flexibility in controlling sun exposure. I planted several tomatoes in containers and moved the pots slightly as summer became hotter, giving them plenty of sun, but afternoon shade on our patio. Of course, you need a properly sized container for the plant you choose. Grape and cherry tomatoes need a little less space than full-sized varieties. You can place containers in the shade of trees, right in the garden, to complement your garden’s design.

Choose cool-season crops

Providing shade extends the season of crops that grow better in cooler temperatures. Choosing some cool-season crops also can save water because these edibles produce in early spring or late fall, using less water than those grown in hot summer sun. We’ve used shade to grow lettuce mixes and spinach. Again, using containers for these crops allows you to easily move the container when summer sun or drought stress the plants. And containers help you grow edibles close to your kitchen for more months of the year.

spinach in metal container
Lettuce and spinach prefer cooler temperatures; our apricot provided afternoon shade for a spinach container.

Although you might not think you’re saving water when soaking tomatoes, consider the amount of water that goes into tomatoes you buy at the store, along with the energy used to transport them. Most of all, take a bite of a tomato right from the vine and you’ll quickly lose your taste for any store-bought fruit.

Tomatoes, green beans and cucumbers fresh from our kitchen garden.
Tomatoes, green beans and cucumbers fresh from our kitchen garden.