Jul 27, Red Raspberry Bush Pruning. Summer-bearing – Remove all weak canes to the ground in early spring. Leave 10 to 12 of the healthiest canes, about ¼ inches ( cm.) in diameter, with 6 inch (15 cm.) spacing. Tip prune any that may have suffered cold damage. Following summer harvest, prune off the old fruiting canes to the ground.
Raspberry plants are pruned by cutting back canes after they bear fruit. Cut back one-crop, summer-bearing raspberry canes as soon as the harvest is over.
Cut these just harvested canes down to the ground. Do not prune back new canes that have emerged during the summer. After the old, fruit-bearing canes have been cut back, train the new canes to a post or to one or two. As your raspberry plants mature, it is recommended that you cut back the small, thin canes to leave only about 8 to 10 of the strongest ones.
Pruning Black Raspberry Plants. Black raspberry plants have a slightly different growth habit, so pruning is slightly different as a result. When new shoots are 3 feet tall, prune off the tips. How you prune a raspberry plant depends upon when the plant bears fruit- once a year or twice a year. Raspberries can be divided into two types by when they bear fruit: (1) one-crop, summer-bearing raspberries also called standard raspberries and (2) two-crop, summer and fall bearing raspberries, also called ever-bearing raspberries.
Red raspberries can bear one-crop or two Estimated Reading Time: 3 mins. If raspberry stalks are supposed to be bending down to the ground, it is not necessary to cut off annual shoots in the fall. They are shortened in the spring, after the snow melts. Proper pruning of raspberries in the fall is really necessary.