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| Western Chokecherry (Prunus virginiana var. demissa): Mother Nature's Garden of Health |
It’s
difficult to conjure up a February-appropriate plant that we haven’t previously
profiled. But one that’s getting to a
reasonable size is the Western chokecherry, Prunus
virginiana var. demissa, in
Mother Nature’s Garden of Health. The
scientific name is pronounced: PROO-nus ver-jin-ee-AN-uh dee-MISS-uh.
Prunus virginiana is native to North America. It once grew wild in much of Canada, the
United States and northern Mexico. There
are two recognized varieties: Prunus virginiana var. virginiana
(the eastern chokecherry, native to the eastern US and Canada); and Prunus
virginiana var. demissa (the western chokecherry, native from WA, OR
and CA east to the Rockies and Mid-West).
In
California, Western chokecherry grows in many wooded and shrubby habitats from
San Diego County to the Oregon border, at elevations below about 8000-10,000
ft. (2500 m.). It’s not native to either the Southern California coast or the
Central Valley, and grows mostly in areas with winter snow, or near seeps and
stream bottoms. In Los Angeles County,
it can still be seen in the Liebre and San Gabriel Mountains – and in
gardens. It grows in most foothill and
mountain plant communities, especially scrub lands, oak/pine woodlands and
coniferous forests.
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| Western Chokecherry (Prunus virginiana var. demissa): Four year old plant |
Prunus virginiana
is a large shrub or small tree. It varies greatly in size and form, sometimes
appearing as a 3-4 ft. shrub. In other
sites, it can achieve mature heights of 20-30 ft. (6-9 meters). Its mature spread can be 15-20 ft. The overall form is erect, with many slender
branches. The bark is reddish on new growth, becoming gray. Some plants are shrub-like, with much
branching from the base. Others are more
tree-like, with a central leader. In
some situations, Chokecherries form dense thickets. This characteristic makes them particularly
suitable for hedgerows and screens. For
more photos of Chokecherry plants see reference 1, below.
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| Western Chokecherry (Prunus virginiana var. demissa): leaves |
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Chokecherries
are winter-deciduous, losing all their leaves in late fall in colder climates. In cold climates, leaves turn an attractive
gold or orange in fall, making them a good source of fall color. In warmer sites (like Mother Nature’s Garden
of Health), plants may retain their leaves well into winter in some years. The leaves are simple, ovate to elliptical,
with finely-toothed margins. The new
leaves are bright green in spring, maturing to medium or dark green above and
slightly paler green beneath. The leaves
contrast pleasantly with the bark, which is smooth and dark red on younger
twigs and often gray on mature branches.
The foliage is a larval food source for Small-eyed Sphinx Moth &
Columbia Silk Moth.
Like many members of the genus Prunus, parts of the plant are toxic. New growth, wilted leaves, or plant parts injured
by frost or drought are particularly harmful if ingested by humans or
animals. Domestic cattle and sheep have been poisoned eating too much foliage. Despite this, Chokecherries are widely used as
a forage plant in wild. Animals as
varied as bears, moose, coyotes, bighorn sheep, pronghorn, elk, deer and
smaller mammals all browse Chokecherry.
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| Western Chokecherry (Prunus virginiana var. demissa): Flowers photo by Mary Winter, Cal Photos |
Chokecherry
flowers have many characteristics typical of the genus Prunus. The flowers themselves are small, white to
cream-colored, with five simple petals (flower parts in fives). The flowers are arranged along drooping, 2-5
inch flowering stalks, and may be densely packed. Plants are very showy in bloom, and the
species is often used as an ornamental shrub/tree in home landscapes. The flowers are sweetly scented – with a
slight hint of almond – and attract a wide range of pollinators, including
native bees and butterflies.
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| Western Chokecherry (Prunus virginiana var. demissa): ripe fruits |
Chokecherry
is probably best known for its fruits. The fruits are small (1/4 to ½ inch), shiny
‘cherries’ that begin green, then ripen to either red, dark-red or almost black
(Four Corners States; Rockies). Even when ripe, the raw fruits are very bitter,
hence the common name ‘Chokecherry’. None-the-less, birds and animals relish
the fruits. If you grow Chokecherry for
its fruit, you may need to protect the ripe fruits from hungry birds!
The seeds (pits)
contain high concentrations of hydrogen cyanide, a potent poison. Fruits
should not be eaten raw; however they can be cooked to render the fruit
non-toxic, particularly when the seeds (pits) are removed after cooking. Chokecherry jelly and syrup are highly
prized for their color and cherry flavor.
They are one of the favorites at garden gourmet events in our gardens.
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| Western Chokecherry (Prunus virginiana var. demissa): jelly |
Chokecherries
can be grown in all but the heaviest clay soils. They don’t do well in soils
with pH > about 7.8. They are shade
tolerant and do well in part-shade and under trees. While they can be grown in full sun (with
adequate water), they are probably most successful when given afternoon shade
in Southern California. Chokecherries
like a richer soil than many of our local natives. Organic mulch can be used to supply nutrients
– or fertilize with a low-dose fertilizer in spring.
Chokecherries
also need some summer water. They have some deep roots, but also many shallow
roots. In the lowlands of Southern
California, they likely will need water every 2-3 weeks from June through
September. We water our Prunus
virginiana every
other week in Mother Nature’s Garden of Health. The soil dries out between waterings in our
clay-loam soil. We’ve also located our plant on the north side of a tall wall,
providing more shade than in most of our garden.
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| Western Chokecherry (Prunus virginiana var. demissa) |
Like
most Prunus (plums, cherries,
peaches, nectarines, apricots, almonds) Prunus virginiana is
susceptible to black knot fungus, fireblight, and several other diseases. In
general – and with judicious watering – it is healthier then the domesticated Prunus.
But keep an eye out for disease, and prune out diseased wood right away
(using sterile pruners). Western chokecherry
has a pleasant natural shape. Unless you’re training your Chokecherry to a
tree or espalier it won’t need much pruning.
But you will need to prune off the root suckers, which can be common in
this species.
If
you’re in the market for a large shrub/small tree Prunus virginiana has much to recommend it. It can be used in a mixed hedgerow or pruned
up as a shade tree. In our garden, we
are espaliering our Chokecherry along a wall (most Prunus are good
candidates for espalier). The foliage is
pleasant and the flowers are showy and fragrant. The fruits can be used to make delectable
jelly, syrup, fruit leathers, cordials and wine – or left as habitat for
fruit-eating birds.
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| Western Chokecherry (Prunus virginiana var. demissa): Rancho Santa Ana Botanic Garden, Claremont, CA |
Traditional
medicine used tea made from the bark for stomach ailments, coughs, colds and diarrhea,
and as a sedative. The ‘tea’, as well as
a poultice made from the leaves, was used to treat cuts, sores, bruises. Dried, powdered bark was used similarly. The
ripe fruit is a laxative. And leaves,
bark and fruits can be used as natural dyes.
In
short, Western Chokecherry is an attractive shrub/tree with many uses. It’s one of those native plants that provides
lots of value for its cost – and the space it takes in a garden. If you need a large shrub or small tree, Prunus
virginiana may be right for your garden.
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| Western Chokecherry (Prunus virginiana var. demissa): in garden, Montrose CO |
For plant
information sheets on other native plants see: http://nativeplantscsudh.blogspot.com/p/gallery-of-native-plants_17.html
We
welcome your comments (below). You can
also send your questions to: mothernaturesbackyard10@gmail.com
