QuestionsHow to growFlowersBorder Perennial FlowersDicentra Spectablis 0 Vote Up Vote Down Freda O\’Sullivan asked 11 years ago Planted a Dicentra Spectablis last month. It is growing profusely. Can I prune it back? If so, how and when. 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 3 years ago No need, it will die back in autumn anyway.