Help your garden grow and even help local farmers by including native plants that attract bees and other pollinators to your yard.
Diseases such as Colony Collapse Disorder, and other factors, have led to declining domesticated bee numbers in the United States. However, there are plenty of species of wild, or native, bees still buzzing around looking for pollen.
Wild bees typically aren’t part of hives; they fend for themselves, living in the ground or in hollow stems of plants. Pesticides, insecticides and other dangers still can harm wild bees. Recent studies have shown that newer insecticides called neonicotinoids are absorbed by plants and can show up in pollen. Farmers and home or business owners use neonicotinoids widely to stop pests. They’re toxic to domestic and wild bees. Avoiding use of insecticides that also harm bees is one way to help bees survive and thrive in your landscape.
Here are a few other easy steps to take:
Since wild bees nest in soil and hollow branches, homeowners can ensure a few protected sites in their lawn for bees. This article from the Great Pollinator Project goes into detail on how to help ground nesters and other wild bees.
Basically, some protected and sunny soil and leaving some dead branches on the ground or on shrubs such as sumac can help cavity nesters. You also can install artificial sites such as nesting blocks.
Plant Low-water Flowers
Plenty of favorite New Mexico flowers attract bees and other pollinators. Here’s a list of some of the popular choices of shrubs and flowers that grow in New Mexico gardens:
Agastache (also a big draw for hummingbirds)
Hollyhock (Alcea rosea)
Penstemon (with many native species for hummingbirds too)
The more months or seasons you have plants that attract bees in bloom, the better. We have some native, weed-like groundcovers that bloom in early spring, typically by April 1, that attract so many bees that we hear a low buzz sound all day when sunny. Leave flowers and seedheads on some annuals well into fall and frost danger to provide food for bees and birds. Even in higher mountain regions, native species of penstemon, beebalm and yarrow can bloom well into fall, as can hardy flowers such as gaillardia and cosmos.
Finally, a word about fear of bees. I get it – wasps and bees can be scary if they come after your dessert on the patio or buzz you when you get too close. But I have never had a sting while working in my garden, and the only time I recall ever being stung was when I was a child and running through the lawn barefoot. Even when I trim lavender stalks, the bees might buzz me, but don’t sting. And if you want to remove spent flowers from plants, choose low-light times of day, such as dusk, when bees are less active. Most of all, please don’t avoid plants that bees love just to keep them out of your yard. You’re not just helping bees or the environment at large, you’re supporting a mini ecosystem that makes sure tomatoes and other edible plants produce food for you and your family.
We’ve been busy prepping our lawn and gardens for a wedding. Our daughter, Rebecca, married the love of her life, Dave Higgins, last weekend here in Ruidoso Downs. I had to post some photos, most of which are courtesy of family and our outstanding professional photographer and friend, Jessica Inman. See links to photo credits and local services at the end.
Many thanks to all family and friends who helped us out, especially Jenny Ruiz, Kathy and Dave Toupal and Jeri Baker.
The following Ruidoso and Albuquerque businesses helped make the Higgins Ruidoso Downs wedding possible:
I tend to hibernate in winter, and emerge only on days that are sunny (common), not windy (rare) and warmer than normal for this time of year (sporadic). I get why animals do the same, and I love the thought that I’m helping them get through winter in some small way.
Here are a few ideas for helping area birds and wildlife with your landscape:
Deer have their own diet, thank you
Animal lovers feel empathy for wildlife when severe weather hits, leading to cold and scarcity of plants the animals browse. Unfortunately, tourists in mountain communities appear to be more interested in taking selfies with wildlife. We live near a resort town, where small herds of deer and elk (and bears) live in or enter populated areas. I’ve seen tourists pull over and feed deer. I don’t even want to know what they are feeding the animals. It’s also likely that some people in wildlife areas put out feeders to attract deer. But I don’t agree with that for several reasons.
Ups and downs of feeders
First, deer take time to adjust to new foods, many of which are not easily digested by wild animals. The kitchen scraps or Doritos from a car window can do more harm than good. Even if a homeowner sets out a feeder with pellets designed for the deer diet, doing so changes browsing and movement patterns and makes it easier for predators to find and prey on herds. The deer also can depend on humans or compete more for concentrated food sources, which means the weak ones lose out at a feeder. In open areas with natural food sources, the fawns and young bucks can find nearby sources when kicked off the favored spots.
We live in a residential area with large lots and our deer are not as used to people as those a few miles up the road. I like it that way, and instead of feeding them, we leave our grass longer in fall to help with their browsing (and we believe it helps improve native grass coverage the next spring). We also do our best not to bother the herd by walking slowly and away from them if possible when sharing space outdoors. That also means teaching our dogs to ignore them.
I have wondered and worried why deer don’t come around when we have a blanket of snow on the ground, but I thought it might be too difficult to get to the food below. That is true, and deer know to fatten up and live off reserves, staying close to their trees up higher for shelter. Coming down to graze through a layer or snow would take more energy than the payoff. Other wildlife shelter ideas are piles of dead tree limbs away from the house and in protected areas, along with fencing that is easy for deer and elk to enter.
Feeding birds in winter
We do supplement birds’ diets in winter, and although I will continue doing so, I see some evidence of the same problems that can occur at deer feeders. First, hawks and kestrels come right into the garden, hunting near the feeders. They would help me and themselves more by finding some yummy mice to eat instead. Second, we see some feeder competition at times, but we have several different feeders/types of food, and for the most part, the birds all play well together. Placing feeders at different spots and filling them with different energy sources can support more types of birds, especially during migration.
Natural food and shelter
Of course, natural food sources are great for birds too. But by late winter, the stores of berries, nuts, and seeds on flowers, trees and bushes has dwindled. As I wrote about this time last year, birds need extra food in winter to gather energy to fight cold. And many, such as juncos, must replenish that energy daily in cold weather.
Plants also provide shelter, and placing both shelter and food sources at various heights and spots in your garden offers some protection. Here are some bird-friendly plants:
Flowers for seeds, including sunflowers, Echinacea (coneflower), coreopsis, salvias, and many native grasses and annuals. Milkweed (Asclepias) not only helps Monarch butterflies, but attracts plenty of insects that birds eat.
Fruiting vines and shrubs such as Virginia creeper (Pathenocissus quinqefolia), wild grapes, elderberry (Sambucus) and serviceberry (Amalanchier utahensis Koehne, or Utah serviceberry),
Native trees for fruits, nuts and shelter. Birds need a high place to land when escaping or looking for predators. Evergreens such as arborvitae (Thuja occidentalis) and all spruces offer dense shelter from the elements for landing or nesting.
These plants also can provide winter interest for homeowners’ gardens and can feed birds through fall and early winter in some cases.
I’ll admit that part of my willingness to also spend the money on bird seed is selfish. It’s nice to watch the bird show from our window when the plants are dormant and I’m stuck inside. But I also like to think that the shelter and food our place provides help ease the burden for these and other creatures.
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.
Need to ease into saving water in the lawn? Or just ease into gardening? As you think about next spring and ideas for improving both the look and sustainability of your lawn or garden, consider adding easy-care plants that need little to no watering. Here are five ideas:
Rosemary (Rosmarinus officinalis). The woody, herbal rosemary is near the top of my list of favorite xeric plants. The only problem you can have with rosemary is if it receives too much water (or snowpack in winter). Otherwise, try a creeping rosemary near a rock or low garden wall. The stems will grow over the surface and you can trim it in spring just to keep it clean and healthy. I’ve seen bushier varieties shaped into small hedges. And man, what a great-smelling hedge! Finally, be sure to plant a rosemary near your kitchen so you can head out and clip cuttings for cooking use anytime of year (at least in zones 8 through 10). We have rosemary plants that come back each year here in zone 6B. They’re near the house in a rock garden, which helps warm them up. Plant rosemary in full sun and only water occasionally after its first season in the garden. Rosemary plants also reward you with tiny lavender-colored flowers in summer. And although I love the taste of rosemary, deer leave them alone. Bonus!
Barberry (Berberis). Barberry comes in several varieties that do well in plenty of sun (or partial shade) and low water. Berberis x ‘Tara’ Emerald Carousel is a type that grows well in alkaline soils, the kind we have here in New Mexico. Depending on the variety, barberry grows a little wider than high. Some Japanese barberries can grow tall – up to 10 feet – so consider that when selecting a plant. Barberry leaves change color with the season, and I’ve seen lime, orange and deep red varieties; they’re all stunning. Several plants along a wall can form a hedge in front of a house or fence. We like the spiky red foliage for its color and texture in our garden and deer usually avoid the plants. Barberries might need a little more water in the first year or so than some plants listed here. After that, they can handle periods of near drought or drought. All you have to do is prune them once or twice a year to keep the shape or size you like. Be sure to wear gloves!
Yarrow (Achillea). Yarrow is considered an herb, but I grow it for its easy care and stunning colors, which include white, yellow and red varieties. Moonshine yarrow has bright yellow flower clusters that you can cut for arrangements. I also pressed a few this year. This truly is one of the easiest plants to grow. Each spring, you simply cut off the dead flower stalks and clean up the plant. By mid-summer, you’ll have color. I even tried trimming spent flowers off one of our yarrow plants this year to see if that would force a second bloom sooner. But the ones I didn’t trim had more blooms in the second wave of flowers than the one I trimmed. Lesson learned. After the initial spring trimming, just leave yarrow alone. The plant also spreads but not invasively, so consider that when placing it in a design. We dug up one that was too close to another plant and transplanted it near our farm to attract butterflies and bees. It needs a little more water when first planted or transplanted. After that, it can get by with no water in all but the most severe droughts and survives winters down to zone 3.
Four-wing saltbush (Atriplex canescens). Native Americans used many parts of the native four-wing saltbush, including leaves and boiled roots, for food or medicine. It’s also useful to wildlife, grazed by deer and antelope. The name for the bush comes from the four paper-like wings that surround its seeds. There’s no real care needed for saltbush, especially in a natural garden, but you can trim it as desired. When saltbush flowers, it takes on an attractive two-tone effect. The native plant is easy to grow in any soil, and can pop up around roadways in New Mexico. Ours grows far from the garden along a fence. We don’t know if the former owners planted it or if it came up from seed. If you’re worried about it spreading, just learn to recognize the plant’s needle-like leaves and pull up any small plants in your garden or yard.
Jupiter’s beard (Centrathus ruber ‘Coccineus’). At first glance, Jupiter’s beard (also called red valerian) doesn’t look like much. The flowers rise above thin, pointed, pale-green leaves. So it’s a lot of foliage mixed in with small, coral-pink flowers. But these flowers pack a punch! They’ll bring bees and hummingbirds to your garden all summer. And they grow best in dry, hot conditions. Still, red valerian can survive frost down to zone 3, or about -30 degrees F. All you have to do is give Jupiter’s beard a sunny spot and water regularly the first spring and summer. Then you can pretty much leave it alone. We water once in spring, depending on rain. You can cut back old leaves and stalks in spring to give energy to new growth. The plant reaches about 2 feet high and wide.
Winter has come late this year, and that’s alright with me. But we’re sure to face a hard freeze soon and it’s time to protect some plants.
The first line of defense, of course, is to choose plants that are hardy down to your average low winter temperature. These plants might look dead in winter, but they come back as spring warms the air and ground. We can’t control the weather, however, so when exceptions to your typical low hit or you really want a plant on the border for your temperatures, you can help that prized plant make it through the winter. Here are a few tips:
Planning ahead helps. When placing a new plant in your landscape, be sure to consider its winter hardiness when you plant. Placing it in a warm microclimate, such as against a south-facing wall or fence, can keep the plant a few degrees warmer when temperatures dive on winter nights.
Mulching over bulbs or around the roots of perennials and even trees can help the ground retain heat. I use raked-up leaves and sometimes straw. In addition, I use rock mulch around xeric plants. The rocks absorb and reflect heat.
Sadly, we can’t all afford or find space for an actual greenhouse. You can buy or create mini-greenhouses around a few plants. Ours only need a small boost, so we often use 5-gallon buckets with the bottom cut out. We sometimes top them with wire for deer protection or cloth for extra warmth. Glass adds even more warmth and a cloche, French for “bell,” is a glass jar that can cover individual plants. There are lots of ideas online for constructing mini-greenhouses out of plastic and wood or PVC pipe, but you’ll need to remove anything that airtight as soon as the temperature warms back up following a freeze. Otherwise, condensation forms inside; the water drops refreeze and actually can damage your tender plant.
A sheet or blanket wrapped around an entire plant helps protect it from freeze on the occasional cold night. Again, this is a temporary fix. If you have an entire section of plants that need protection, it’s better to rig a system with hoops or sticks and fabric row cover. If leaving the cloth on the entire winter, be sure to use a landscape fabric that allows sun and water through. I like to open these on warm, sunny days.
Plants need to head into winter in a healthy state. That includes keeping them watered (at a reduced rate) if you haven’t received precipitation recently. Cold, windy air dries plants out and stresses them. There is no need to prune most perennials before winter. It’s best to let them die off naturally, feeding birds with seeds. You’ll trim trees while they’re dormant in winter. When freeze threatens, you can water the mulch around the plant, but avoid hitting the leaves and branches. The water in the mulch helps hold heat in. I’ve also seen suggestions of placing used plastic bottles filled with warm water around the mulch to conduct some heat during a freeze.
Bring plants inside
No greenhouse? How about the house? My largest geranium loves the sun from our bathroom window, and the humidity likely helps as well. We have so many plants to bring inside that some have to live in the garage, where it can get chilly but hasn’t gotten below freezing. If you want to invest some money, you can buy grow lights for plants that need more sun than available in your home or garage space. Spray the plants off and let them dry a bit before carrying them inside. This helps reduce the chance that bugs tag along for the ride.
Check out lots more ideas on our Pinterest boards (What’s wrong with my plant? and Greenhouses)
You know, I hate to sound ungrateful. We always need rain in New Mexico, if not to water all of the grass, trees and native plants, then to replace our valuable water tables. But in a climate of extremes, especially this summer, we’ve had several weeks of too much water and cool temperatures.
Typically, New Mexico and many Southwestern states receive monsoon rain in the summer, and it accounts for at least half of the rain we receive in New Mexico and Arizona. Monsoons can start around mid-June and end late in September. Ours typically begin around the 4th of July. Monsoons consist of short but strong bursts of rain, usually in the afternoon. They’re fueled by the sun’s warming of Southwest land and nearby oceans at different rates. Water evaporation creates humidity over land, forming the clouds that then depend on temperature, atmospheric pressure, winds and mountain slopes to turn into storms.
Typical is key here, however. This year, we had few to no monsoon storms. Instead, we had unseasonably hot and dry, followed by weeks of unseasonably cool and wet. The first rains did wonders at greening up our native grasses and plants. But then in August, the rain and clouds just kept coming. We just had a break, but now Hurricane Newton has struck Mexico and its remnant moisture is headed for southern Arizona and New Mexico.
If arid areas need rain, why is so much rain bad? Flash flooding is a big problem in desert and mountain areas. But how does heavy rain affect xeric lawns and gardens?
First, plant roots need more than water to survive and thrive; they also need air. When you place a new plant in the ground, for example, you should press the soil around it lightly and avoid compacting it to the point that air can’t reach the roots. When excessive rain falls, the water replaces air in spaces around soil particles. As the water drains through the soil, air can again enter the spaces. But if the water keeps flowing from the surface, or especially pools, the spaces fail to open. Eventually, roots can be damaged and fail to even take up the water that surrounds them.
The second danger of too much water is disease. Any fungal organisms in the soil can more easily attack wet plant roots and cause root rot. Xeric plants are not used to so much water on their leaves and roots. Even leaves are affected by too much water falling and sitting on them, especially without sun and heat to dry them again. Plants are more susceptible to leaf diseases such as leaf spot or blight and have less chlorophyll, which affects appearance and photosynthesis. Eventually, poor leaf health can lead to the breakdown of most of the processes that keep a plant healthy and send energy to fruit and flowers.
Many xeric plants also like sun and a little heat. Native plants have adapted to the Southwest monsoon patterns that usually rule their growing season: A gradual, sunny warm-up in the morning, followed by scattered building clouds. They get a nice drink in the heat of the afternoon, and then the sun comes back out and the air and ground warm up again. This pattern helps dry the plant and soil, and gives the plant plenty of heat and sun. Although nights can be cool in many areas of the high desert and intermountain regions, mornings warm up again after sunrise. Extended periods of cloudy, cool weather lead to too little sun for plants, along with too little heat than they need to thrive and flower.
Even edibles can have problems from too much water. They’re susceptible to root rot, depending on lots of other factors such as soil quality. Leafy vegetables and herbs flower early. Tomato fruit tastes better with moderate water. Too much water, especially inconsistent amounts, can cause fruit to crack.
Keeping Xeric Plants Alive During High Rain Periods
Make sure all plants, and especially those susceptible to root rot, are in soil that drains well. Raised beds, mounds or berms, and suitable containers can help drain soil around plants much better than compacted soil. If you’re not sure how well your soil drains, you can typically tell when it pools or soaks in hours after heavy rains. Or you can try the test in this handout from TreePeople that times water drainage.
Provide air circulation. We all have a tendency to place new plants and seedlings too close together. You might as well get as many cucumbers as possible in the limited space you have, right? But lack of air circulation in crowded plants hides bugs, causes the leaves to maintain moisture, and even can shade ground around roots. Wet conditions harbor new problems that native plants in particular can’t take.
Another problem with extended periods of rain is weed control. Although mostly native, the darn weeds seem to love excess moisture. And before you know it, they crowd and wrap around important garden plants or shading grasses. It’s hard to control them if the ground is too wet to mow or you can’t even get outside.
Build raised beds or transplant susceptible plants to higher ground. We’ve had some drainage problems near our patio and are working on a dry river bed to divert water away from the house foundation and down into a grassy area, where it can soak grass and eventually add to groundwater. One step we took was to divide a blue mist spirea (Caryopteris clandonensis) and move the portion near the patio onto a small burm. The xeric plant is so much happier now.
Whatever you do, don’t water! Turn off drip or sprinkler systems during and after periods of rain; it’s just the responsible thing to do. And don’t assume that yellowing leaves indicate the need to water. With too much water, the leaves look sort of floppy, but too little water usually causes dry, brittle foliage.
Finally, don’t stress. You can’t control weather, so simply keeping your plants as healthy as possible within time and weather constraints is all a gardener can do!
Yesterday, I joined two friends on a perfect trip to the nearby Hondo Iris Farm, on Hwy 70 about 20 miles east of Ruidoso. Each year, it’s such a joy to see the irises in full bloom around Mother’s Day and to wish that I could purchase nearly every color and type of iris I see.
But I considered as we walked around yesterday that the Hondo Iris Farm is more than a striking display of irises. It’s a local botanical garden, shop, nursery and perfect place for a picnic! My friends brought delicious food and we ate on a lower picnic table closer to the valley. A group of ladies gathered for their own spring picnic at a table right next to the rows of iris.
The Hondo Valley runs along the Hondo River (Rio Hondo), which begins where the Rio Ruidoso and Rio Bonito rivers merge. The Rio Hondo runs nearly 80 miles, where it feeds the Pecos River just outside Roswell. The valley is bordered by mountains and has witnessed the history of Native Americans, homesteaders, Billy the Kid and lawmen, and was once a rich farming area with large apple orchards.
Here’s this year’s pictorial tribute to the Hondo Iris Farm. The farm charges no admission. If you can’t come in person, check out their online catalog. And check out more photos from the farm on my Photos page.
When you shop for your lawn and garden, all nursery plants should have tags that include information about sun and water needs, and about the plant’s hardiness zone. The official zones for the United States are the USDA Plant Hardiness zones. Canada uses the Agriculture Canada Plant Hardiness Zones Map.
Improvements in Hardiness Zones
For the most part, the USDA system is based on the lowest average winter temperature. A few years ago, the USDA updated its zone map because of warming temperatures. The former map relied on data through 1986, and this one is more current. The USDA web site also has added an interactive map for users. You can enter your ZIP code and get the zone instead of guessing whether your town is light yellow or nearly light yellow on the map. So it’s now GIS-based and pretty precise; the USDA map ranges from zones 1 through 13, with 13 as the warmest zone.
Canada’s map is based on climate data and information about plants in the area. The formula to determine zones include mean frost period length, snow depth, high temperatures and wind data, among other information. The zones range from 0 to 9, with zone 0 as the coldest. Canada’s site also features a terrific search that gives zone-specific information for plants.
Sunset Zones a Bonus for Western States
It’s important to know whether a tree, shrub or other perennial will survive your zone’s winter before you plan or purchase; the USDA map helps with gardeners’ decisions. Sunset (Sunset Western Garden Guides) takes the information a few steps further – by telling gardeners about a plant’s chances all year long. For example, we’re in USDA zone 6B, but so are parts of Virginia and other Atlantic areas, as well as parts of Washington and Oregon. Although El Nino has disrupted normal patters, it’s safe to say that plants get lots more rain in Washington and Virginia.
Sunset looks at distance from the equator to help calculate length and severity of winters. The zone map also separates areas with similar temperature ranges according to coastal location or elevation. At more than a mile high, the elevation matters. Our days might warm as much as a comparable location at 2,000 feet altitude, but our nights cool considerably more. Most of all, Sunset knows the western part of the country. Sunset has 24 zones for the American West, divided by geography and climate. Our small town isn’t notated on the map, so it’s a little tough to determine our exact zone. But Sunset places us in the high desert/intermountain region, and the information still is helpful.
Interestingly, Sunset also provides zone information for the rest of the country. It would be well worth it for gardeners east of the Rocky Mountains to review the Sunset zones for information such as wind and climate extremes.
Gardeners can avoid confusion about zones in plant purchasing and care information by knowing both USDA and Sunset numbers for their locale. Typically, all plants except Sunset’s own will use the USDA zone on the tag.
Use Zone Data with Microclimates
If you’re still uncertain about zone, you can check with local Master Gardeners. Another reason to ask a seasoned gardener about climate and zone is microclimates. In many Western states, zone varies within a metropolitan area. Think of the areas above and below southern California’s thermal belts. The ocean has little to do with the climate in those distinct areas. In Albuquerque, temperature and wind can vary markedly from the foothills of the Sandia Mountains to the valley floors.
Knowing particulars for your area of a town or region helps, but you can take it a step further if you want to push the edges of a plant’s hardiness zone or care needs. If you’re half a zone colder than the plant’s care information recommends, plant it against a south-facing wall. Plants that need protection from heat can go on the northeast side of your home, where the house shades them on blazing afternoons.
And since we’re all about the water out here, microclimates help with water use as well. For example, I might be able to place a shrub that needs a little more water at the bottom of a hill, welling on the downside to catch some of the rainwater.
So remember to pay attention to zone, sun and water needs when buying plants, especially in chain stores, which might stock plants too far out of your zone to keep alive all year. Your plants will be healthier and you’ll save money and time.
It’s spiny, really spiny. But the Euphorbia milii is a succulent, not a cactus. The plant, which is native to Madagascar and can grow up to six feet tall in the right conditions, is an excellent houseplant choice. When growing the crown of thorns, however, be sure to place it out of high-traffic areas. Like many euphorbias, the crown of thorns produces a milk-like sap that can irritate the skin. Mature plants can spread to a width of several feet, depending on pruning. And those thorns – they are about one-half-inch long and located all along the woody stems.
A Madagascar Native
This interesting succulent goes by many names. It used to be called Euphorbia splendens, and splendid seems more appropriate for this plant. But millii is in honor of Baron Milius, who introduced the plant to France in 1821. It’s also sometimes called the Christplant. The crown of thorns was introduced to the United States through Florida.
The crown of thorns is among succulents most often mistaken for a cactus. The spines don’t rise from a single areole, however, which helps differentiate spiny euphorbias from true cacti. And as a houseplant, it’s not likely to reach six feet, although we had one that grew to more than two feet before Tim trimmed it back and propagated new plants from the cuttings.
This euphorbia is only hardy as a perennial in zone 10 and higher, where it makes a fine shrub choice. It requires little watering or care, and only some warmth and sunshine to bloom almost continuously. By placing our crown of thorns in a sunny, south-facing window and giving it a summer vacation outside once temperatures warm, we’ve enjoyed blooms all year long.
The crown of thorns is a relative of the poinsettia, and original plants had deeper red flowers than those available today. New cultivars of the Euphorbia millii have smaller thorns, but what sort of a challenge is that? Most crown of thorn plants available for growing in containers are smaller than those placed in tropical landscapes, and flowers on the houseplants are only about one-half inch in diameter. But it doesn’t seem to matter; for one, the flowers appear in groupings. And I love the effect of the tiny, subtle blooms on such a thorny plant.
The crown of thorns is vulnerable to mites, mealy bugs and whiteflies. The only other problem that can occur with the easy-care succulent is overwatering. Place Euphorbia millii plants and cuttings in well-draining soil.