If we do not think winter gardens are very interesting, we need to change our view. We can choose trees and shrubs that will create winter interest. We can add color and texture and create an engaging view from our window.
When we planned our new Greenfield garden, I was thinking about low maintenance, plants for pollinators, and tolerance for spring floods. It was by pure luck that I now see some of those plants double their appeal by providing winter interest through color and texture. To begin, I have three dogwood shrub cultivars. These shrubs are very tolerant of the cold and of periods of flooding. They are sometimes suggested for rain gardens.
I think my osier dogwood may be Cornus sanguinea ‘Winter Flame’ because it matches a catalog description. It is quite tall, about 8 feet, with twigs in surprising shades of orange, yellow and red. I also have the more familiar red twig dogwood. a deep wine red, but I have lost the name of this particular cultivar. Other cultivars like Arctic Fire and Siberica are brighter, clearer reds. I do know that my yellow twig dogwood is named Flaviramea and sings out its bright color in the winter sun.
Flaviramea has particularly pleased me, sited as it is in the middle of the garden where I can see it from my kitchen windows. The golden green glow in the sun is cheering. I do have to prune it to keep low branches from rooting in the soil and sending out new plants. In my wet garden this is a vigorous and happy plant. All the dogwoods have small flowers in the spring and white berries in late summer.
Equally happy in my wet garden are the winterberries. The winterberry, Ilex verticillata, is a native holly. I have two red winterberry shrubs, and one with golden berries. These are not only bright and pretty, birds like the berries. It is important to remember that winterberries are dioecious. This means the male and female flowers are on separate plants. To get berries I need to have female and male plants. The male plant is virile, pollinating up to ten nearby female plants, but it is smaller and less showy.
I also have two healthy English hollies, Ilex aquifolium, in front of the house, a male and a larger female loaded with berries. They came with the house so I don’t know their cultivar names, but some of these English holly hybrids come with names like Blue Princess and Blue Prince. I enjoy pruning the berry laden branches for Christmas decorations in the house.
If I had room I would love to have a hawthorn tree, Crateagus, which will grow to about 25 to 35 feet with an equal spread. Crateagus viridis is a native hawthorn with showy white flowers in the spring and red fruits called pomes in the fall and winter. Unlike many other hawthorns, C. viridis Winter King does not have large sharp spines, making them easier to prune and care for. This tree will attract butterflies in the spring and summer, and birds in the fall and winter. I think birds are an important element of winter interest. You can see six berried hawthorns at the Energy Park.
Flowering crabapples are a delightful sight in the spring and there are dozens of cultivars. Sugar Tyme is a good size for a small garden, reaching a height of about 18 feet with a 15 foot spread. It is highly disease resistant and has pale pink buds that open to white flowers. Its benefit to the winter garden is that it holds its little red crabapples well through the winter. Other small crabapples include Donald Wyman and Callaway which both have white spring blossoms. Adams has double pink blossoms. All have been praised for their hardiness and disease resistance, by horticulturists like Michael Dirr. They are decorative, and provide food for wintering birds. I must point out that crabapples are not as amenable to flooding as the winterberries and river birches.
Tree bark, as well as berries can provide winter interest. We have planted two clumps of river birch, Betula nigra, which will grow to about 40 feet tall. They are known to thrive in wet, heavy clay soils, and don’t mind flooding which makes them perfect rain garden plants. There are flowers and catkins in the spring, but we planted them because of their beautiful exfoliating bark. It is the texture and pale color of the bark that appeals to me.
Another tree noted for its exfoliating bark is the paperbark maple, Acer griseum. The foliage gives good red fall color in the northeast but it is the color and shagginess of its reddish-brown exfoliating bark that is stunning in the snowy landscape. The bark ranges in color from a rich coppery shade to darker cinnamon that peels away in large curls that remain on the tree. I saw a number of these trees planted in the beautiful Monk’s Garden at the Isabella Stewart Museum in Boston. They are small upright trees that will reach a height of 20 to 30 feet.
The sun is shining today, and the air is mild but snow will come and I will find loveliness in my garden.
Between the Rows January 5, 2019