Spring has come early to New Mexico this year. We’re been breaking records for high temperatures. That’s been so nice and has really improved my mood. I’ll even consider it lucky, since we have lots to accomplish before summer.
Of course, our average last frost is around May 10, and April 15 in Albuquerque. So I fear all of the pretty flowers on the fruit trees will freeze at the worst possible time. Or that my impatience with cleaning up and lightly pruning xeric perennials will backfire. I choose to remain optimistic.
Enjoy these green (and a few other colors) early spring finds. Just click on any thumbnail to start the slide show.
Each year various societies present plant awards, but those of us who garden in the West and Southwest await the group of Plant Select top performers. Plant Select, which is a nonprofit joint effort of Colorado State University in Ft. Collins, the Denver Botanic Gardens and professional horticulturalists, lists five top performers at various elevations.
First, a word about why the work of Plant Select and other regional groups is so important. As I said, there are plenty of awards and lots of information in the gardening world. But, for the most part, plants emphasized by magazines and bloggers are great for East Coast and Southeastern region gardeners. It’s different in the high plains and intermountain areas of the country, where altitude, wind, and heat and cold extremes (in a single day and by season) affect plant health. And let’s not forget the water issue.
Plant Select evaluates plant performance in 53 locations throughout five Western states. Here are some of the 2016 Top Performers. See the entire list at Plant Select.
Grand Winner: Blonde Ambition Grama Grass
Blonde Ambition grama (Bouteloua gracilis ‘Blonde Ambition’ PP22,048) was introduced by New Mexico’s David Salman of High Country Gardens (American Meadows). Blue grama is a perfect low-water native grass grazed on by cattle on our Southwest ranches. Salman introduced the blonde ornamental variety in 2011, and this is the second year it has been Plant Select’s grand winner. Beginning in July, chartreuse blooms (seedheads) appear on upright stems, turning to the blonde color as they age. Watching those seedheads wave in winter winds provides xeric gardeners some year-round interest in their landscapes. Although Blonde Ambition can spread by seed, the seedlings are easily pulled up. The grass is hardy in zones 4 through 9 and deer resistant.
Top Performer at 3,000 to 5,500 Feet Elevation
Blonde Ambition also tops the list of lower elevation garden performers in the region. Number 2 on the list is a tree I’ve never grown, but want to learn more about since it also topped the list for gardens at my altitude (6,300 feet). The Hot Wings Tatarian maple (Acer tataricum ‘Gar ann’PP15,023) has bright red samaras, or fruit made of paper tissue, that bloom all summer. It’s also known for its reddish-purple fall color. The Tartarian maple is a relatively small tree, maturing to nearly 18 feet high and wide, and gets by with full sun and moderate to dry water needs. The only drawback for me is that it is not deer resistant, but I could see this gorgeous tree in any suburban garden from 3,000 to 7,000 feet in elevation and in zones 4 through 10. We still might try it, but we’ll have to fence the tree until it reaches a mature height and keep lower limbs pruned.
Top Performer at 5,501 to 7,000 Feet elevation
Although the Hot Wings maple topped the list of performers at this elevation, I would like to give a nod to No. 2 on the list – Turkish veronica (Veronica liwanensis). Veronica is an excellent low-water groundcover. Veronica is evergreen, so it covers portions of our rock garden all year long. In summer, the groundcover blooms. Turkish veronica has cobalt blue flowers above waxy leaves. It only reaches about 2 inches in height, but can spread to 18 inches wide. Although veronica is a xeric plant, its leaves look better with a little extra water in the heat of summer. Turkish veronica is hardy in zones 3 through 10 and deer resistant. The top 5 Plant Select performers at this elevation also include Blonde Ambition, Apache plume and a catmint called Little Trudy (Nepeta ‘Psfike’ PP18,904).
Top Performer in Gardens Higher than 7,000 Feet
Fernbush (Chamaebatiaria millefolium) topped the list for higher elevations. The Western native shrub is xeric once established and grows more upright with less water. It can look more formal with rounded pruning in early winter. Deadheading spent flowers also makes the plant look neater, and should be pleasant considering that the foliage has a honey-like scent. The sweet scent also deters deer. Fernbush can grow to nearly 5 feet high and wide; less water keeps it more compact. The plant thrives in full or partial sun in zones 4B through 8.
These are only a few of the top performers in the Plant Select list. Check out their site for more on current and past top performers, new plant introductions for the region and where to buy plants for High Plains and Intermountain gardens.
Gardeners often choose plants more for their flower color or ease of care, and that’s a great way to enjoy a garden. If you want to add interest to a xeric bed or lawn, it also helps to consider plants’ shapes and textures. Shape, or form, refers to the circles, lines and squares of plants or how you arrange plants. Texture relates to how coarse or fine a plant looks and even feels.
For example, there’s a reason why many professional container arrangements usually include a grass or similar plant with tall, thin blades. The grass rises from at or near the center of the pot, adding height. The long, slender blades of ornamental grasses also vary the shape and texture of the arrangement if it’s filled with low-growing, round flowers. You can do the same in your xeric garden.
Although it can be tough for some gardeners to adapt to the Southwest after owning lawns with formal cottage gardens, they eventually learn to love the look and easy maintenance of more native, “unsculpted” plants.
Although some landscapes look great with rows of the same plant, most xeric gardens have a more natural feel. The designer or home gardener can use a variety of low-water plants to vary shapes. For example, if you want to plant cacti and succulents in your container or garden, you aren’t likely to choose all prickly pear cacti (Opuntia). Their round pads and medium-height spread complement a spikier ocotillo (Fouquieriaceae) or a spiraling sedum groundcover.
The shapes in xeric plants typically are less defined. Still, plants have a basic shape, such as how lavender stalks form a rounded V.
Those who desire a more balanced or symmetrical look can repeat a plant. Some of the most effective landscapes I’ve seen have a row or grouping of xeric ornamental grasses. Individually, the grasses have a wispy, wild look. But when placed in a grouping, they sway in the wind together and create a clean line. Too much variety can cause a xeric garden to look more like a botanical garden full of eye-catching plants with no flow if not designed by professionals.
Foliage and texture
Many xeric plants produce remarkable flowers, and some bloom throughout the growing season. But one way xeric plants survive is with relatively smaller foliage. Less leaf area means less transpiration (water evaporating from leaves) and improved survival chances in arid climates. Still, a waterwise garden can include foliage variety in texture, size, shape and color.
Some xeric plants, such as pineleaf penstemon (Penstemon pinifolius) have tiny, needle-like leaves. These contrast nicely with nearby plants that have rounder, lusher foliage, adding varied shapes and textures to the garden.
You also can add texture with hardscape materials or yard art. Hardscaping materials include just about anything that isn’t a live plant. So, for example, you can add interest around a rock or boulder with a plant that has small, twisting or draping branches. A post fence has lines that run up and down, and I believe that a mix of small, round or trailing plants look better against it than a line of tall or upright plants. Hardscape items also add texture, such as rough rockiness or smooth backdrops.
Rhythm is an important landscape design that can be achieved with cautious repetition of shapes, curves and layers. Some of the best designs have layers. For example, you can plant a groundcover (a low-growing or trailing plant that typically spreads) in front of a shrub that has long, thin branches and few flowers.
When layering plants, or in any planting, it’s important to consider a plant’s mature size. If not, your nice round shrub might catch up to or even block the tall one behind it. It also helps to know a little about pruning. You don’t have to shape plants into animal characters, but it helps to know how to trim the plant for its health and growth (even control of growth). Otherwise, plants can later upset balance and rhythm in the garden.
Hardscaping is use of anything other than plants, really, in the garden. So it includes rocks, fences, walls, walls made of rocks, pavers, stepping stones, lighting, gravel (made from rocks) and found or repurposed objects. Did I mention rocks?
Here’s the problem: When people think of xeriscaping or converting high-water lawns and landscapes to more waterwise plans, they often turn to landscape gravel, rock borders and concrete to fill their landscape. Done! But the best xeric landscapes mix functional and attractive hardscaping with plants for full effect.
Pros of Hardscaping
I find that after touring a public or private garden, my photos often include fences, garden art and other hardscaping features. I guess I’m drawn to them. Any plant can shine when placed before a solid wall or large boulder, but those with tiny flowers and foliage really pop with a backdrop. And you don’t have to use large, expensive artwork or structures. Sometimes, all you need is a well-placed rock or container.
Aside from aesthetics, hardscaping features provide function in the landscape. Pathways lead the gardener, visitor and the eye in the best direction, or help a homeowner get from one point to another more easily. Fences and walls improve privacy and arbors and pergolas add to shade in sunny garden spots.
Finally, homeowners often put in hardscaping to minimize watering and plant care. Most nonplant items in the garden require little to no care and last for years.
Cons of Hardscaping
Replacing lawn and plant materials with hardscaping can lower maintenance, but can create too much heat in the lawn and garden. A concrete patio or gravel-covered yard is way hotter than turf and plants. That being said, a mix of both helps lower water use and costs. If done right, homeowners can enjoy their gardens and save water.
Only plant materials provide important food and pollen for animals and insects; bushes and trees also provide better shelter than the eaves of your home. Adding birdhouses and beehouses near plants can help nature’s garden visitors. Too much concrete and gravel also makes a garden seem unfriendly to people. You probably want privacy and a place to sit or walk, but don’t you also want flowering or edible plants nearby? If a big patio is necessary for entertaining, add container plants on the ground, walls or even the furniture.
Finally, be sure to consider existing trees and other plants you plan to keep when converting lawns to gravel. Trees need deep watering, and the roots stretch out at least to the tree’s canopy, which is how far out branches and leaves extend. So providing a pretty little circle of mulch around the trunk likely isn’t enough.
Some of my favorite xeric landscapes combine a few featured plants such as a shade tree or colorful bush with low-growing annuals or groundcovers that cascade over steps or rocks. Combining hardscape and plant features is a smart xeriscaping strategy and a way to enjoy your lawn for years to come.
It smells fantastic, looks gorgeous, attracts bees and butterflies and needs little water or care. And on top of that, it’s a useful herb. Truly, I can find no drawback to growing lavender in the arid Southwest. Still, I’ve talked to several people while selling at farmers’ markets who say they had trouble establishing or maintaining lavender. So, here are a few tips, because I wouldn’t mind seeing lavender on every corner of every town.
Where to plant lavender
It’s tempting to plant lavender everywhere in the landscape! But the plant does best in full sun and with plenty of air circulation. So, if you plant lavender on the north side of your house, especially up against the house, it might not do well. You can also plant lavender in containers, but might have to amend soil around the plant after a year or two. Be sure to place the container in full sun and give the container plant a little more water than it would need in the ground — but not too much!
Lavender hedges are a summer stunner. But if you want to plant a row of lavender, be sure to leave plenty of spacing between the plants, and between the lavender and other plants or structures in your garden. It won’t look as full the first year. But by year two, you’ll love how the flower stems nearly touch but the plants have plenty of room. And foremost, plant lavender where you can enjoy the scent and pollinators the plant attracts. And check nurseries soon for a new variety from Sunset called “Meerlo,” which has variegated leaves!
When to plant lavender
Whatever date you think is right for lavender, push it back a week. Seriously, the only real problem we had with some lavender plants occurred when a group of new plants were shipped to us too far ahead of our last frost date. Fearing the plants were becoming rootbound in their small nursery pots, I planted as soon as the frost passed. But the ground and air were still a little too cool, plus the dirt did not drain as well as other spots in our garden. So that meant the new plants would stay wet after rain or watering. The only problem that really affects lavender is root rot. So be sure the ground and temperature have warmed up enough before planting.
How to plant lavender
First, make sure the variety of lavender you’re ordered or chosen at a nursery is a perennial in your area. Years ago, I assumed that French lavender (which really is from Spain) would do better in our climate than English lavender. It’s so cool and damp there! But French lavender is not as cold hardy. Most varieties of English lavender, however, can survive U.S. winters. Just check the zone when you buy.
Here’s the trick to success with lavender: Plant it on a small mound. This is a departure from typical attempts to save water by welling around plants. A well can hold water in longer, but lavender wants to take a drink and then dry out. Also, by gathering up a mound of dirt, you give the young roots some nice loose soil.
My second tip is to surround your lavender not with organic mulches, but with tiny white pebbles or decomposed granite. Doing so still allows water to penetrate, but gives the plants reflected sun and passive solar heat gain. If you use rocks and have as many weeds as we have, you’ll need to try and get the mulch layer at least three inches high. But leave a border several inches around the new plant on every side so the rocks don’t crowd the lavender base and constrict growth. Water more often than the plant tag says for a few weeks or more, until the plants look settled in their new home. But let new lavender plants dry out a little between watering or rain.
How to care for lavender
So, you have your lavender established. The hard part’s done! All you have to do how is harvest the gorgeous flower stems as the flowers begin to open in summer. In warmer climates, you often get a second bloom. We’ve found that our second bloom in zone 6B is pretty sporadic, even lousy. So it’s really a matter of choice – you can harvest early and enjoy the scent inside your home, or leave the stems on the plant to enjoy its color and share its fragrance with pollinators.
Just be sure to trim the stems off – right at the top of the leaves – at the end of summer or in early fall. Don’t worry if your plant turns a little gray in winter; it should begin to green up along with other perennial plants in spring. As new leaves begin to emerge in spring, trim your plant for shape and health. That means avoiding cutting down into the woody stems. I give mine a nice round shape. So simple.
That second year, your plant should need little to no watering. I typically give lavender plants some water right after trimming in spring and then only water if we have severe drought.
The stems are easy to dry and place in a vase or use harvested buds to make sachets or potpourri. Lavender is great in homemade gifts and even as an edible.
A droopy, wilting plant. It’s a gardener’s instinct to automatically assume: It needs water. And sometimes, that’s a good instinct. But low-water plants just as easily can be killed by kindness as by neglect.
For example, several problems with tomato fruits are caused by too much water, or especially irregular watering. Plants, like people, need some regular hydration. You wouldn’t avoid drinking water for five days and then gulp down a liter, right? One reason drip systems are effective is the consistency (assuming you set a timer) of the amount of water they deliver, along with the slow rate of flow and the fact that they water the soil/roots and not a plant’s leaves. The delivery and slow flow help retain more moisture and nutrients around the roots.
What’s the prognosis?
There are reasons other than drought stress that cause plants to wilt, including problems with the roots. That’s why plants you’ve just transplanted from seed or a nursery container tend to wilt for a few days or weeks. The roots suffer some damage when taken from a pot and replanted. Understand that this is part of the natural course of the plant’s life and help it through without stressing too much (meaning you, not the plant). Even though a plant is waterwise, it still needs extra water until the roots heal and begin to grow, more efficiently pulling water into the plant. If the ground is dry at root level, the roots can’t do their work. Plants that are overwatered sometimes wilt, too, further complicating the “diagnosis.”
Speaking of, most gardeners jump to the worst possible scenario when determining a plant problem. Although disease is a possibility, look not only for symptoms of a particular wilt or fungal disease, but also for possible causes. Do you have evidence of bugs that might have damaged leaves or carried a disease to your plant? Is the plant getting enough air circulation? Is water running off and away from the plant? Has it just been super hot for several days?
The best way to distinguish drought stress from other causes of wilt is by looking at and feeling the soil. Damp soil means the plant has water available; adding water at this point likely won’t help. You should feel an inch or two below the surface. One way is to stick your finger in the dirt to about the first knuckle joint.
Prevent plant stress
When a plant needs water, it’s more susceptible to damage from bugs and diseases. Pests attack the weak. You can prevent plant stress from underwatering by:
Checking the soil as mentioned above; see if there is water for the plant.
Looking for signs of underwatering. These usually include leaves turning yellow and brown, and even falling off. Typically, drought stress begins with lower leaves.
Thinking about the plant’s environment and how it might have changed. Is it windy and hot or muggy and cool in the evenings? Did you last water a plant in the afternoon out of necessity instead of your usual morning routine?
Using a meter or records when in doubt. We have an inexpensive moisture meter for our farm area. If nothing else, it helps confirm or deny my suspicions about the need to water and gives me a basis for comparing soils or drip rates around certain plants. Keeping records of watering, fertilizing and other activities can help manage and diagnose plant problems.
It’s always better to water before a plant wilts, and not to wait until wilting occurs. Although plant roots need to seek water, they also have to find it! When no water is available in the soil around them, plants can begin reacting with wilt, slowed growth or flower and fruit production, and other signs.
Finally, remember there is no hard and fast rule on watering. Much of the advice I see comes from areas that are more humid, cooler, less windy, and at lower altitude than our conditions here in New Mexico. Having said that, you can create conditions that help plants retain moisture, mostly by ensuring healthy soil and mulching. Containers need a little more frequent watering because they dry out faster than the ground. Water container and landscape plants slowly so the moisture drips instead of flooding down. You probably only need to add water to a container when the top few inches of soil are dry.
Even waterwise plants get stressed when exposed to high heat, dry air and wind. Many Southwestern plants can survive hot temperatures because they’re native to the low desert. But in some areas such as the mountains and high deserts, native plants are a little more winter hardy and a little less heat tolerant.
Even in the hottest Southwest and West climates, plants can need extra attention when temperatures soar. Here are 10 tips for helping plants survive the heat of summer.
Tip No. 1. Use drip irrigation.
You save water because it can’t evaporate as rapidly as it can if in the air, and the water seeps slowly down to the roots of a plant. This helps cool roots as well as hydrate them.
Tip No. 2. Use mulch.
Something as simple as straw spread out on the dirt helps keep air from rapidly evaporating water, but still allows oxygen to reach soil and roots. Piling the straw or other organic mulch two to three inches high helps even more.
Tip No. 3. Try to get your plants established before summer heat ramps up.
Even heat-loving plants can wilt when temperatures soar. Still, recognize that wilting from sun can be temporary. The bigger the plant’s leaves, the more quickly the plant transpirates, which is the process of water evaporation through leaves. That’s why many succulents and xeric plants have small foliage. So don’t panic, but don’t completely discount it. Increase drip time on hot and windy days.
Tip No. 4. Water in the morning if at all possible.
This is a great water-saving strategy and helps prevent heat stress to plants. If the roots already have access to water, they can begin sending the water up through stems and leaves to keep the plant nourished. For most plants, regular, but spaced, deep watering always beats out frequent light watering (which leaves moisture close to the surface and can restrict root growth).
Tip No. 5. Check on your plants.
If you can’t check them during the day, do so as soon as you get home. It’s OK to water plants lightly in late afternoon to help cool them down.
Tip No. 6. Use one plant as a benchmark.
For example, zucchini leaves are large, and if they’re wilting, you can prevent heat or drought damage to other plants nearby with a cool drink of water or some shade.
Tip No. 7. Shade plants.
New or damaged plants might need temporary shade to build up resistance to heat. Direct sun can burn leaves just like it can burn your skin. So make sure even an established plant is in the right location for sun and summer exposure and if not, try temporary shade.
Tip No. 8. Use containers.
Containers offer you the most opportunity to shade plants on hot days. Although soil in containers warms faster, containers also can cool more quickly. Most of all, it’s easy to move all but the largest into shade temporarily. You can mulch the top of the soil in a container, too.
Tip No. 9. Avoid fertilizing plants during the heat of the day.
Plants should be perky and healthy before soaking up fertilizer. And the fertilizer needs to mix with plenty of water. It’s best to do this task before mid-day heat kicks in.
Tip No. 10. Control weeds.
Ha, there’s an impossible goal around here. And I know there are people who embrace weeds. I tolerate them only because I can’t keep up. But we’re really vigilant about keeping weeds off of or out from under plants. That’s especially true in the vegetable garden. Mulching can help control weeds.
Finally, if you keep potted plants, including cacti, inside during the winter, you need to protect them as they adapt to being outside. That’s true even for sun lovers. Harden the plant off if you can. If the plant is too heavy to bring in and out all day (or you have 30 of them, like we do), at least start it outside on a cooler, cloudier day.
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.
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.
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!
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.
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.
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.
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.
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.
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.
Container gardening is the mainstay of apartment and small-home gardeners. But even with four acres to play on, we plant plenty of succulents, herbs, vegetables and a few ornamentas in containers. For gardeners with more space, containers add convenience for kitchen garden edibles, and for moving plants that spend winter indoors. There are plenty of reasons to choose containers and plenty of ways to manage water use with container-grown plants.
The right plant
Annuals are great choices for container gardening, since you don’t ever have to repot the plant. And since xeric perennials need little water once established, having some annuals in containers or a small bed is a perfect splurge, especially if the annuals reseed.
It’s true that container plants need more frequent watering, so low-water herbs and other xeric plants make the best choices. But you can grow edibles and any small plant in a container. In my mind, the water for edibles produces food. And as long as I water responsibly, I’m OK with using a container and hand watering lettuce and tomatoes instead of using drip irrigation in the ground.
When creating arrangements, place plants with similar sun and water needs together. If you really want a centerpiece plant that uses a little more water, find a way to contain it by placing it in a plastic nursery pot (probably a few inches larger than the one it came in) inside a larger decorative one. Underplanting with flowers can disguise the trick that lets you focus a little extra water on one plant without overwatering others.
I love to repurpose and use fun and funky containers when I can, but I typically use well-designed plastic or glazed containers for edibles. Plastic containers usually use the least amount of water, and glazed containers slightly more. We have lots of clay containers too, but we reserve most of those for cacti and succulents. Clay dries out quickly, so it’s best reserved for the lowest water users. And although photos always show containers filled to the edges with plants, consider mature growth even for summer annuals. For example, petunias multiply! It’s so fun to create a mini-garden scene with a big grouping of containers, especially if you have the space and money. I have a small grouping of more attractive and slightly lush containers in the front of our home, but the ones in the back are for function as much as form.
Prep the container
It’s important to use good soil for container plants and not extra dirt from the hole you just dug for your rose bush! Placing it in a pot just creates a big, clay petri dish for disease, insects and weeds to grow in. Soil also tends to compact more easily in a container. And the nutrients available for flower and fruit production are limited compared with the big, open ground.
You can add small stones along the bottom to help with drainage and reduce watering by using a potting mix with polymer crystals that hold some moisture and then release it. Or add something more sustainable such as Growstones. Just don’t use a rich mix that retains moisture for cacti or other plants that need well-drained soil.
When choosing organic potting mixes for edibles or just because, use some caution. Many potting mixes labeled organic are so similar to compost that they contain plenty of nutrients, but are too dense to use alone. A lighter mix helps air and water reach roots. Look for organic fillers such as coco husks. And don’t overfill the pot; you need a few inches at the top for water to sit while it drains down. If you get the soil level too high, water can run out the top of the container.
The key to healthy container plants and water savings is to water slowly. Flooding a container plant washes out important soil nutrients. Placing a small coffee filter over the drainage hole allows water through but stops soil and nutrients from washing out the bottom. I try to pour slowly from my pail and then return a few minutes later for a second slow watering as I make my way from container to container. We use rain water as much as possible for container watering.
If you have a drip system with good pressure, you can have it set up to water containers, especially grouped one. You could use an olla, which is a clay bottle you bury in the container that slowly seeps water and can be refilled. To me, one of the best qualities of containers is that you can move them to meet shifting sun requirements or whims. And when a plant begins to wilt, it might not need more water – it just may need less sun.
I’m not big on fertilizing because it can lead to too much leaf and branch growth (and not enough to fruit and flowers) or burn plants if done too soon or incorrectly. I’d rather keep improving soil in beds so plants get most of their nutrition each year from natural ingredients. But container plants can need a little extra help. Compost tea or a light application of a product like Happy Frog every few weeks can support container plants.
I’m hoping to order some new containers this year locally or from Arizona Pottery. I’ll update when I can.
It’s one thing to enjoy the look or scent of a plant and its flowers; it’s a bonus when the plant rewards the gardener with other uses. And to me, any plant that attracts pollinators and people is a useful one. Some plants do more, however, doubling as edible, decorative or medicinal plants for the home. Here are five plants with home uses that also survive low-water or drought conditions once established.
Lavender (lavandula) seems to be tops on any plant list I compose. I’ve yet to meet anyone who doesn’t care for the scent, and bees and butterflies flock to the flower stems. And the flowers – you can cut them for arrangements, dry them to make gifts and even use buds in recipes. Lavender is touted for its soothing qualities for skin and stress, as well as its aroma. The plants are easy to care for in a low-water garden. Simply give them well-draining soil so the roots dry between rain or watering. Harvest the first flush of flower stalks and you’ll likely have another bloom in late summer. Otherwise, trim only to shape in spring.
Another favorite low-water herb is thyme. Just touching it gives your hand a salty, earthy scent. You can cut entire stalks in the fall for drying, or cut a fresh sprig for flavoring poultry. It’s an excellent herb for flavoring vegetables with strong flavors, such as cabbage. Tiny purple flowers emerge on longer stems that haven’t been harvested, attracting bees and adding delicate color to a xeric garden. German thyme is hardy in zones 5 through 9, but lemon thyme needs a little more heat (zones 7 through 9). Just give thyme plenty of sun and well-drained soil and it will spread, creating a low bushy appearance in the garden.
Sea holly (Eryngium amethystinum) has a thistle-like appearance to me. The drought-tolerant flower is a perfect choice for rock gardens, or even sandy beach gardens. That’s because it loves hot, dry conditions. Big Blue reaches heights or nearly three feet. The stunning silver-blue flowers are spiny in texture. Use sea holly indoors by cutting a few flower stalks to include in arrangements. Not many other cut flowers have their color, texture or unique look. Sea holly grows in zones 2 through 10.
Got sunburn? Fresh gel from your own aloe vera plant (Aloe barbadensis) can provide soothing relief for burns and skin rashes. Of course, sunburns are more likely to occur in areas where you can grow aloe vera plants outside, like Maui, where we used aloe to soothe our tourist “color.” So, it’s an outside plant only in about zone 10B, or where night temperatures go no lower than 40 degrees F. Aloe vera also needs well-draining, even dry soil. The plant stores water in its fleshy leaves, which makes the well-known gel. If you’re in most zones, you can grow aloe vera as a houseplant and summer outdoor visitor. When you need to extract gel, you can use simple kitchen items. Here’s an article explaining how to get gel from aloe leaves.
Growing nut and fruit trees for shade and food is a smart xeric gardening strategy. Of course, you have to pick the right tree or shrub. The pineapple guava (Feijoa or Acca sellowiana) is an excellent example of a tree that bears juicy, full fruits but with less water than some fruit trees. These aren’t like truly tropical guavas, but have a taste that resembles a mix of pear and pineapple. The plant is drought tolerant but a little more water ensures late summer to fall fruit. And even if they don’t fruit much, the gorgeous white and red flowers look good enough to eat. It’s too cold in New Mexico, but southern California gardeners can enjoy the plant and its fruit. In fact, we spotted a guava in the lawn of a Pasadena home. I was too busy being jealous to take a photo. Here’s a photo and more information on the plant from Monrovia.