At the end of the harvest period, cut the stems which have fruited down to the ground, leave new growth alone as this is where next year’s harvest will develop. Don’t forget to wear sturdy gardening gloves and old clothes when handling blackberry plants!
Ensure that your canes do not overgrow and become tangled, without free circulation of air and access to sun, if this occurs then prune strategically in April, or consider changing the supports provided for the canes.
Wooden posts 2 metres high with wires strung between them will allow you to tie some growth to supports so that the canes grow into a tunnel shape over the ground. Good air circulation helps to keep disease down to a low level.
Use a fruit cage if birds and small mammals are a particular problem. New blackberries can be propagated easily by bending and burying a growing tip in a 14 cm hole, filled in with soil.
After two months, new tips will have grown. The new plants can be transplanted in the spring, cutting the original stem away at around 25 to 30 cm away from the new blackberry plant.