Oakleaf Hydrangea

Making Bushes Bloom

Anonymous added on July 14, 2011 | Answered

I've got an oakleaf hydrangea and a smoke bush which both grow huge and healthy looking each summer, but neither has flowered for over 10 years (they were planted 11 years ago). I prune them back in late fall. What can I do to get them to bloom?

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Certified GKH Gardening Expert
Answered on July 14, 2011

I would suspect that they have too little phosphorus, especially if they are planted near a lawn area that gets regularly fertilized. This article will explain more: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/phosphorus-plant-growth.htm

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