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How to prune weigela
Saw 2-3 secondary stems to the ground on mature plants.
Cutting secondary stems will give you a fuller weigela plant. Locate 2-3 branches that are growing next to the main stem and use a hand-held pruning saw to cut the stems upward at a 45-degree angle.
Saw the stems as close to the ground as you can. This will divert the plant's energy to the main stem and new growth, which will promote stronger blooms.