Cheyenne Garden Gossip

Gardening on the high plains of southeastern Wyoming

Give your garden winter interest

Boy in backyard

I’m not sure what our son Bryan had in mind when he ventured forth with his toy shovel–digging to plant something, or digging to escape?

Published Dec. 21, 2014, in the Wyoming Tribune Eagle, “Give your garden winter interest.”

By Barb Gorges

“Winter interest” is a term you can Google. You’ll get sites wanting to sell you plants that flower in winter—in Zone 10, in Florida. Or maybe you’ll find Minnesota garden columnist Evelyn Hadden’s viewpoint that winter interest is anything that pokes up through the snow.

Cheyenne isn’t the tropics or the snow-covered north. Though we have at least seven months between the first hard frost of fall and the last in spring, we can be snow-free much of the time.

Winter interest is about the view from your window, rather than the summer experience of being in the garden. It’s about enjoying more subtle textures, such as different kinds of bark; and shapes. It’s about the sculptural qualities of branches. It’s about color, of which there is more than you might think.

Although our house was already 25 years old when we moved in, the winter view of the backyard was bleak: a flat lawn, clothesline poles, two big tree trunks, and all walled in by pink concrete block. Sending the kids out to play reminded me of sending them into a prison yard. It’s improved now with various plantings, but maybe it could be more interesting.

Spruce shrub

The spruce hedge at the entrance to the Cheyenne Botanic Gardens tapers towards the top so lower branches won’t be shaded and die. In the background is the columnar-shaped Woodward Juniper. Photo by Barb Gorges.

In early December, on what he calls a 50-50 day, 50 degree temperature and 50 mph wind, Shane Smith, Cheyenne Botanic Gardens director, and I discussed winter interest and took a tour of the gardens looking for it.

Conifers

The backbone of any Cheyenne garden is the evergreens, providing a backdrop and wind protection. At the entrance to the gardens’ greenhouse, a thick blue spruce hedge about 8 feet high blocks the view of the parking lot.

It started as a row of young, normal spruce trees planted 3 to 4 feet apart, but it’s pruned every year, forming an impenetrable wall. It’s important, Shane pointed out, that the hedge taper, becoming narrower towards the top. Otherwise, the lower branches are shaded, don’t get enough sun and die off.

Besides the typical Christmas-tree shapes, we saw a weeping variety of spruce, developed from trees that are naturally prostrate but can be trained to reach a certain height before cascading.

Junipers perform several functions. Low-growing varieties become ground covers, but Shane said to skip the really low kinds, only 6 inches tall, because they allow weeds to grow up through them.

Another, the Woodward juniper, developed at the old Cheyenne horticulture station, grows tall and narrow, providing a columnar shape that doesn’t take up much ground, and it’s a brighter green than some of the other, shrubbier junipers.

Rabbitbrush

Rabbitbrush is a native adapted to Wyoming’s dry climate. More moisture than regular rainfall will kill it.

One of our native shrubs can provide dried flowers. Rabbitbrush blooms yellow in the fall and the feathery,

pale-colored seed heads persist. The leaves are evergreen. Different varieties can range from a yellow green to a silvery color. You can also check out sagebrush, the epitome of Wyoming’s open spaces, which has silvery leaves year round, plus that quintessential Western smell when you brush against it.

However, both of these natives need to be planted where they won’t be irrigated. More moisture than our natural precipitation can actually kill them.

Deciduous trees and shrubs

It’s easy to think bare branches will be just black silhouettes. But with our abundant, sunny winter days, there is more to see, from gnarly cottonwood to smooth redtwig dogwood. Shane said to keep in mind that for dogwood and other shrubs with colorful bark, only the younger wood will show much color, so it is important to prune part back, close to ground level, every few years to encourage new growth.

Maybe you can choose trees and shrubs with fruit, red rosehips on rose bushes, orange berries on mountain ash, crab apples that cling after the leaves fall away—though how long they last will depend on how hungry the squirrels and birds are.

Karl Foerster grass

“Karl Foerster” is an ornamental type of reed grass. There are several varieties. This one grows 2 feet tall. Photo by Barb Gorges.

Other plants Shane recommended, some of which are growing at the gardens, are ephedra, with its weird bunches of long, match-stick-like twigs; mahonia, which reminds one of holly; mountain mahogany and various hawthorne trees.

Grasses

Ornamental grasses have become part of the professionally designed landscape, including the entrance to the Laramie County Library and many local businesses.

They dry to a nice tawny brown. Unlike other, stronger vegetation, they require only the lightest of breezes to accent the view with motion.

One kind Shane pointed out at the gardens is a variety of Karl Foerster grass growing in a 2-foot tall clump with feathery seed heads.

Another, blue oat grass, resembles a fountain of thin, bluish-green and silver strands which looks good as a lone specimen or as a herd of small, shaggy beasts. Shane said if you have a protected, south-facing exposure, there are other grasses you might try.

 

Blue oat grass

Blue oat grass has a fountain-like look. This specimen measures about 2 feet across. Photo by Barb Gorges.

If, at some point, the grasses are smashed by snow or it’s closing in on spring green-up, it’s time to cut back the tall grasses. Rather than clipping them, Shane simply grabs a bunch and saws through near the base with a small, folding pruning saw.

Perennials and annuals

Vegetable gardens are rather hopeless looking in winter. A good gardener cleans out all that stuff that turns slimy with the first frost. But maybe you left the sunflowers for the birds.

Some perennial herbs have winter color: silvery-looking sage (the cooking kind) and purple-y oregano. And some even stay green.

In the perennial flower bed there are lots of plants that don’t need to be cut back right away. Black-eyed susans, yarrow, and asters have interesting dry flower heads. In my garden, hollyhocks and mullein have big stalks that attract downy woodpeckers.

At the gardens, Shane and I found a clump of golden stalks with dried purple flowers, some kind of ornamental onion. And there was a sedum that had dried nicely.

But there will come a time when some of these dried points of interest break down and you will want to remove them.

Bulbs

Next fall, before heavy frost, get some of those early spring bulbs planted, even if it is just a handful here and there. Finding a crocus in March makes two more months of snow potential much easier to bear.

Ground cover

We still have bluegrass lawn at our house. Where the wind doesn’t blow off the occasional snowfall right away, it gets moisture and looks quite presentable. Native grasses look nice too.

Vinca, a vining ground cover, stays green, as do the leaves of some other low-growing perennials.

Use organic materials as mulch to cover bare spots around trees or in gardens. It’s good for the soil as it decomposes, and it can be interesting to look at, whether it is dried leaves or bark, natural or dyed color. Shane likes the look of pine needle mulch. He’s found if it’s ground up a bit, it doesn’t blow away.

Garden embellishments

Nothing says calendar page photo like snow gathering on a garden bench, wagon wheel or split rail fence. My favorite embellishment is a bird feeder or two, attracting bird color and movement and, even through window glass, cheerful bird sounds.

Junipers

Three varieties of juniper contrast with each other in color as well as growth habit: shrubby, ground cover and upright. Photo by Barb Gorges.

Resources

Go to the Cheyenne Botanic Gardens’ website, www.botanic.org, to the Gardening Tips section, where you will find lists of plants that grow well here.

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