Botanical descriptionPrunus spinosa is a deciduous large shrub or small tree growing to 5 m tall, with blackish bark and dense, stiff, spiny branches. The leaves are oval, 2?4.5 cm long and 1.2?2 cm broad, with a serrated margin. The flowers are 1.5 cm diameter, with five creamy-white petals; they are produced shortly before the leaves in early spring, and are hermaphroditic and insect-pollinated. The fruit, called a "sloe", is a drupe 10?12 millimetres (0.39?0.47 in) in diameter, black with a purple-blue waxy bloom, ripening in autumn, and harvested?traditionally, at least in the UK, in October or November after the first frosts. Sloes are thin-fleshed, with a very strongly astringent flavour when fresh
The sloe is very resistant to maritime exposure and also suckers freely. It can be used as a hedge in exposed maritime positions. The hedge is stock-proof if it is well maintained, though it is rather bare in the winter and, unless the hedge is rather wide, it is not a very good shelter at this time.
Because of its suckering habit, the plant is a natural pioneer species, invading cultivated fields and creating conditions conducive to the regeneration of woodland.
Seed - requires 2 - 3 months cold stratification and is best sown in a cold frame as soon as it is ripe. Sow stored seed in a cold frame as early in the year as possible. Protect the seed from mice etc. The seed can be rather slow, sometimes taking 18 months to germinate. Prick out the seedlings into individual pots when they are large enough to handle. Grow them on in a greenhouse or cold frame for their first winter and plant them out in late spring or early summer of the following year.
An important food plant for the caterpillars of several species of butterfly, especially the larvae of the brown and black hairstreak butterflies. A good bee plant. Plants are shallow-rooted and of a suckering habit, they can form dense impenetrable thickets which are ideal for nesting birds, especially nightingales. Flowers are often damaged by late frosts. Plants regenerate quickly after cutting or after fast moving forest fires, producing suckers from below ground level.This species is notably resistant to honey fungus.
The fruit is similar to a small damson or plum, suitable for preserves, but rather tart and astringent for eating, unless it is picked after the first few days of autumn frost. Some have reported that this effect can be reproduced by freezing harvested sloes, although it is understood that it is the result of the plant withdrawing tannins from the sloes in freezing weather.
Problems, pests & diseases
Associations & Interactions
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Polycultures & Guilds
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