Since these canes bear berries on second year growth, the aim is to prune out only those canes which have fruited this year (floricanes). Through the summer they develop fruit buds along the cane and shoot out little branches which grow berries in Autumn. By winter the leaves have fallen. How to Prune or Cane Fall-Bearing Red Raspberries. Autumn fruiting raspberries are the simplest of all to prune, because they fruit on … This page provides advice on how to prune raspberries and when you should prune your autumn fruiting raspberries. Raspberries are typically planted in late winter to early spring, and with autumn bearing raspberries the primocanes will fruit in the same year, when the autumn season arrives. In the spring, remove all weak, diseased, and damaged canes, leaving only the most vigorous canes. You need to treat the summer ones slightly differently to the autumn ones.Prune all of your autumn fruiting raspberry canes to … Before pruning, it is important to learn the difference between the different raspberry canes, optimal pruning time, and the pruning basics associated with raspberries. Raspberries | Pruning | Gardening Information | Thompson & Morgan. The productive life of this cane is over. While pruning raspberries may seem difficult, it helps stimulate new growth, produces a larger harvest, and removes disease and dead canes from your plant. PRUNING FALL-BEARING RED RASPBERRIES FOR TWO CROPS. Also prune out the tips of the canes. The summer crop will be produced on the side shoots of the remaining portions of the canes. Pruning Summer Raspberries. Different methods are required to prune raspberries of the two different types. Prune summer fruiting raspberries in the late summer or fall, after the berries have been harvested. Pruning autumn bearing raspberries is very simple, just wait until late winter and cut all canes to the ground.