This will encourage healthy new growth.
Prune blueberries in late winter and early spring, when plants are dormant.
Avoid pruning after your harvest in summer and fall. Hardy in U.S. Department of Agriculture plant hardiness zones 3 Missing: Littleton CO. Jul 02, To do tip blackberry pruning, use a sharp, clean pair of pruning shears and cut back the blackberry canes to about 24 inches (61 cm.). If the canes are shorter than 24 inches (61 cm.), simply prune off the top inch ( cm.) or so of the cane.
While you are tip pruning, you can also prune off any diseased or dead bushdigging.clubg: Littleton CO.