Blackberries are productive brambles whose perennial roots send up new canes each year. Modern thornless forms make a generous crop far easier to manage and pick. A well-trained plant can turn a fence line or allotment boundary into a useful late-summer fruit supply.

When and how to sow

Plant bare-root canes from autumn until spring, avoiding frozen or waterlogged ground, or use container-grown plants when conditions are suitable. Select sun or part shade with fertile, free-draining soil, and enrich it with garden compost beforehand. Choose thornless 'Loch Ness' or 'Oregon Thornless' and allow roughly 2 m per plant. Install sturdy posts and horizontal wires before growth starts.

Care

Water during dry spells, especially as flowers and fruit form, and mulch to suppress weeds and retain moisture. Tie new flexible canes to the wires as they lengthen. Immediately after picking, cut every fruited cane down at ground level with secateurs, then retain and tie in the strongest new canes.

Common problems

Birds enjoy ripening berries, so use netting that is held clear of the fruiting canes. Crowded growth encourages mould and weak shoots. Keep the row narrow, remove damaged or diseased canes promptly, and pick often. Slugs may spoil low fruit, particularly in wet summers.

Harvest

Berries are ready from late summer into autumn when fully black, plump and easily detached, with no red patches remaining. Pick in dry weather every few days and handle them lightly. They keep only briefly in the refrigerator, so eat, cook or freeze them soon after gathering.

Growing Blackberries: frequently asked questions

When should I sow blackberries in the UK?

Plant bare-root canes from autumn until spring, avoiding frozen or waterlogged ground, or use container-grown plants when conditions are suitable.

What are common problems when growing blackberries?

Birds enjoy ripening berries, so use netting that is held clear of the fruiting canes.

When is blackberries ready to harvest?

Berries are ready from late summer into autumn when fully black, plump and easily detached, with no red patches remaining.

General guidance for UK home gardens and allotments. Reference figures are typical values; your exact timing depends on your region, last-frost date and variety. Page updated 18 Sep 2026.