QuestionsHow to growTrees and ShrubsPruningPruning Acacia dealbata 0 Vote Up Vote Down Eleanor McDonogh asked 17 years ago I believe April after flowering is the best time to prune acacia dealbata. Can I prune now or is it better to wait until next year? Many thanks for your help. 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago Spring is the time to prune acacia but it can be pruned in June if needs be.