Cherry — sweet (mountain)

The sweet cherry (Prunus avium), also known as wild cherry, gean, or mountain cherry in upland settings, is a medium-to-large deciduous tree in the rose family (Rosaceae).¹² It is the wild ancestor of the cultivated sweet cherries grown in orchards, valued both for its edible fruit and its fine timber, and it has supplied much of the genetic base of modern dessert cultivars.³⁴ For a homesteader in a temperate climate with genuine winter cold, it is a long-lived overstorey tree that earns its space twice over: showy spring bloom that feeds bees, then dark summer drupes — given the cool, well-drained, frost-sheltered site it demands.²⁵

How to identify it

Sweet cherry is a deciduous tree with a broadly rounded or broad-oval crown.²³ In the wild it typically reaches 15 to 25 m tall; landscape specimens are often smaller, in the range of roughly 4.5 to 9 m, though they can still reach about 15 m.²³⁵ The bark is reddish-brown to gray-brown, often glossy, marked with prominent horizontal lenticels and peeling in horizontal strips — a classic cherry signature.²⁵ Twigs are gray-brown with large reddish-brown buds and frequent short spur shoots, and carry a mild bitter-almond taste from cyanogenic compounds.³⁵

The leaves are alternate and simple, oval to obovate, about 6 to 15 cm (2 to 5 in) long, with a finely serrated margin of slightly rounded teeth.²⁵ A reliable cherry clue is the pair of darkened glands on the petiole.⁵ Foliage is dull green in summer and turns yellow-red in autumn.² Flowers are showy and white, about an inch across, fragrant, and borne in clusters of 3 to 5; they open in early spring (April through much of its range) before or as the leaves emerge.³⁵ The fruit is a fleshy drupe with a single hard stone, usually dark red to nearly black and about 1 to 1.5 cm (½ to 1 in) across, though some wild forms run yellow to red; it matures in early to mid-summer.²³⁵

Growing sweet (mountain) cherry

Orchard and garden trees are almost always budded or grafted onto rootstocks rather than grown from seed; seed is reserved mainly for breeding and for raising rootstocks.⁶ The rootstock you choose sets the eventual size and character of the tree:

• Mazzard — produces the largest, most vigorous trees.⁶
• Mahaleb — tolerant of calcareous (lime-rich) soils and of drought.⁶
• Gisela — newer dwarfing and semi-dwarfing rootstocks developed in Germany, giving more compact, early-bearing trees.⁶

Site it in full sun, which it needs for good flowering and fruiting.³ Sweet cherry prefers deep, fertile, well-drained soil and will grow on clay, loam, sandy, or calcareous ground as long as drainage is good — but it performs very poorly on heavy or poorly drained soil, so it is not a tree for wet, waterlogged corners.²⁶ It does best in cooler, relatively dry climates with a low risk of late spring frosts and relatively little rainfall around harvest, since wet conditions at ripening drive fruit cracking.⁶ Late frosts and wet summers can both severely reduce fruit set and quality, so frost-sheltered, airy sites are worth seeking out.⁶ The flowers are insect-pollinated, especially by bees, so the early bloom is a genuine asset to the wider garden.¹³

Climate and hardiness

Sweet cherry is firmly a cool-climate tree. It can withstand temperatures down to about −35 °C, and North American extension sources list it as hardy in USDA zones 3a to 8b.²³ For homesteaders, that means success across most temperate regions with cold winters, with late frosts and wet summers the main limiting factors on a good crop.⁶ Its broad native range spans Europe, Anatolia, the Maghreb of Northwest Africa, and Western Asia — from the British Isles south to Morocco, north to central Norway, and east to the Caucasus and northern Iran, with an isolated population in the western Himalaya.⁴

Harvest and uses

The ripe drupes are picked in early to mid-summer.⁵ The fleshy fruit is edible and is the trait for which the species has long been cultivated, alongside its valued timber.³⁴ As the wild ancestor of cultivated sweet cherries, it sits at the root of the whole dessert-cherry lineage.¹⁴ The spring flowers are also an early, generous nectar and pollen source for bees and other insects, making the tree a useful pollinator anchor in a mixed planting.¹³ One caveat, covered below: only the ripe fruit flesh is safe — the stones and other plant parts are not.³⁴

Safety and cautions

While the ripe fruit flesh is edible, the rest of the plant is not. The leaves, flowers, stems, and especially the seeds (kernels) inside the pits contain cyanogenic glycosides and are poisonous if crushed and ingested in quantity.³⁴ The faint bitter-almond taste of the twigs is a direct sign of these cyanide-yielding compounds.³⁵ In practice: enjoy the fruit, but do not crush or eat the stones, and keep prunings and wilted foliage away from livestock. Treat this as a food tree whose fruit is the only edible part.

Sources

1. Prunus avium — Go Botany, Native Plant Trust
2. Prunus avium, sweet cherry and biodiversity — Cherry Times
3. Prunus avium — North Carolina State Extension Plant Toolbox
4. Prunus avium — Wikipedia
5. Sweet Cherry (Prunus avium) — Virginia Tech Dendrology
6. Sweet Cherry — University of Illinois Extension Hort Answers