Cut back the lateral branches to 12 inches in length for black raspberries and 18 inches for purple raspberries. Starting in late May or when the new growth reaches a height of 36 to 48 inches, pinch out or cut off the shoot tips. Remove about 3 to 4 inches of the shoot stumphauling.buzzted Reading Time: 5 mins.
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. Methuen, MA Tree Pruning- Tree Pruning Service.
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Mar 16, Cut all of the fruited canes down to ground level in late autumn. At this point, there will be some new, young growth. Tie this in at 4-inch intervals to replace the old. When your plants have grown taller, loop the new top growth over and tie this in too. How to Prune Autumn-Fruiting Raspberry CanesEstimated Reading Time: 8 mins. Jun 03, Prune back the whole raspberry bush to ground level during early spring. Thin the canes. As the raspberry canes grow back during summer, thin them to approximately 6 inches apart.
Keep the most vigorous canes, and remove the weak ones outside your designated row stumphauling.buzzted Reading Time: 4 mins.