Answer: Buddleia, the butterfly bush, looks best if the stems are cut back after they've finished blooming. Cutting it back will remove the rank growth and encourage the production of new flowering stems. I've successfully renovated an old buddleia by cutting it all the way down to the ground in late winter or early spring. It reacted by producing lots of new stems and tons of flowers. Cut yours back - at least the stems that have bloomed - and the plant will produce new stems and flowers.
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