Prune raspberry bushes in late winter or early spring. Raspberry bushes are low maintenance plants which need pruning only once a year. Different methods are required to prune raspberries of the two different types.
Cut back the side branches to 12 inches in length for black raspberries and 18 inches for purple raspberries. With the exception of fruit color, the growth and fruiting characteristics of yellow raspberries are identical to red raspberries.
All raspberries should be pruned in March or early April. Late winter/early spring pruning procedures for the different types of raspberries are outlined below. Feb 13, In March or early April, remove all weak, diseased and damaged canes at ground level. Leave the most vigorous canes, those approximately 1/4 inch in diameter when measured 30 inches from the ground.
After thinning, remaining canes should be spaced about 6 inches apart. Jul 27, Black or Purple Raspberry Bush Pruning. Remove fruiting canes after harvest. Tip prune new shoots in early spring 3 to 4 inches ( cm.) to encourage branching. Top these canes again 3 to 4 inches ( cm.) in summer. Then after harvest, remove all dead canes and those smaller than ½ inches (1 cm.) in diameter.
Feb 07, Follow the same pruning procedures as described for the summer-bearing red raspberries. This procedure allows you to obtain both a summer and fall crop. Fall-Bearing Red Raspberries (One Crop System) Prune all canes back to ground level in early spring.
While the summer crop is lost, the fall crop should mature one to two weeks earlier. Mar 25, Mar 25, Raspberries of both summer and fall bearing varieties should be pruned in the winter. This is because the berry canes are fully dormant during this time, so any pruning will stimulate growth, rather than damaging the current growth pattern.
Raspberries can be pruned any time between November and shrubfell.buzz: K. To plant in hills, space plants 2 1/2 feet apart. Purple and black raspberries need 3 to 4 feet between plants in rows, and 8 to 10 feet between rows. If you are digging up plants in the fall.