Weigelas thrive in moist, well-drained locations with full sun and have few problems with insects.
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. Weigela – Pruning, Winter Care and Fertilizing. Pruning this plant at any time is a trade off. Because many of the Weigelia rebloom you have to decide whether shape and the reduce in size is more important than the potential rebloom, its up to you.
Prune these spring flowering shrubs. You can also remove any broken or damaged branches at the end of winter, but a weigela has its heaviest flowering in spring on the previous season's growth, so it's best you don't prune heavily in winter to preserve flower buds.