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Jul 20, If you are pruning weigela bushes for rejuvenation, find the branches of the bush that are old and woody.

Typically, you are looking for branches 1 ½ inches (4 cm.) thick or bigger. Trim these older branches out from their base on the weigela plant. When doing rejuvenation, do not trim more than one-third of the branches out from the bushhaul.barted Reading Time: 3 mins. They also bloom intermittently through the summer on the current season’s growth.

Weigelas are prone to winter dieback. Carefully examine plants in late winter/early spring and prune out any dead wood. If the weigelas suffer little dieback, remove a few of the largest, oldest stems on large, well-established plants. Removal of a few large branches in late winter/early spring allows the shrub to bloom in late.

Late spring or early summer is recommended for weigela pruning- whenever the last flowers have finished blooming.

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Don’t wait long after they’ve bloomed, either- try to prune the plant immediately. If you wait too long, the plant won’t have ample time to produce buds for the following spring.