Rubus affinis aka Vigorous Bramble

Rubus affinis is a deciduous blackberry in the rose family. Kew places its native range in northwestern and western Europe. It grows in temperate climates and forms a scrambling shrub. Plants For A Future records it on moist heath and grassland. In gardens, it can reach about 10 feet [3 metres]. Its spreading form suits the sunny edge of a woodland garden.

The plant sheds its leaves and keeps growing through new shoots. These shoots rise from the roots each year. Each stem lives for two years before it dies. Flowers and fruit develop on stems in their second year. This cycle means the shrub carries stems of different ages. The roots persist while the older fruiting stems die back. The supplied species account gives no further leaf or bark details.

Flowers appear from June to September, according to Plants For A Future. Each flower has both male and female organs. Insects carry pollen between the flowers. The same source records seed ripening from July to September. It describes the fruit as large and suitable for eating. People can eat it raw or use it cooked. The fruit also yields a purple or muted blue dye. No medicinal use is recorded in the supplied account.

This shrub grows in sun or partial shade. It prefers moist ground with good drainage. Plants For A Future recommends a good loam for cultivation. It also lists sandy and clay soils as suitable. Mildly acid, neutral, and mildly alkaline soils all fall within its stated range. The source calls the plant easy to grow. It lists USDA zones 4–8 and reports hardiness to at least 5°F [−15°C]. Its stated needs suit a moist site rather than dry ground.

Seed, cuttings, layering, and division offer ways to raise more plants. Fresh seed can go into a cold frame in early autumn. Stored seed needs a cold period before sowing. Half-ripe cuttings can be taken in July or August. July is also a suitable time for tip layering. Divide plants in early spring or near autumn leaf fall. Plants For A Future lists no known hazards. That statement does not establish safety for every person or pet.