My climbing hydrangea seems well established and is climbing on a structure camouflaging my propane tank. Sun in the afternoon and shade. 4 years now and no flowers. What's up? Is there a male/female requirement like a holly? Barbara
Certified GKH Gardening Expert
No, there is not male and female plants with Hydrangea.
This is likely a lack of phosphorous in the soil.
This link will help you.