Prunus x cistena

(N. E. Hansen) Koehne

Purple-leaf sand cherry

Rosaceae Edible: Fruit, Seeds Potential hazards — see below 73 iNaturalist observations

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Summary

A slow-growing deciduous shrub reaching 2 m by 2 m, hardy to UK zone 4. Flowers May to June; hermaphroditic and insect-pollinated. Tolerates light sandy, medium loamy, and heavy clay soils with good drainage, mildly acidic to basic pH. Grows in semi-shade or full sun, preferring moist conditions.

Description

Edible Uses

The fruit can be eaten raw or cooked and contains a single large seed. The seed can also be eaten raw or cooked, but avoid it if it tastes too bitter.

Medicinal Uses

No specific medicinal uses have been recorded for this species, but like all members of the genus it contains amygdalin and prunasin, compounds that break down in water to release hydrocyanic acid (prussic acid). In small amounts this highly toxic compound can stimulate respiration, aid digestion and produce a sense of well-being.

Known Hazards

Seeds produce cyanide compounds when hydrolyzed; avoid consuming bitter seeds.

Distribution

It is a temperate plant.

Propagation

Seed requires 2–3 months of cold stratification and is best sown in a cold frame as soon as it is ripe. Stored seed should be sown in a cold frame as early in the year as possible, with protection from mice. Germination can be slow, sometimes taking up to 18 months. Prick seedlings out into individual pots when large enough to handle, overwinter in a greenhouse or cold frame, and plant out in late spring or early summer the following year. As a hybrid, this species will not come true from seed. Cuttings of half-ripe wood with a heel can be taken in July/August in a frame. Softwood cuttings from vigorous plants can be taken in spring to early summer in a frame. Layering can be done in spring.