QuestionsHow to growTrees and ShrubsTrainingHydrangea wont flower 0 Vote Up Vote Down Yvonne McGonigle asked 14 years ago I have planted about six hydrangea plants approx two years ago and none of them are flowering. They are all doing well with leaves and growing but wont flower. 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago Young hydrangeas grow rapidly and then flower. frost might have knocked flower buds.