I have grown a hydrangea from a cutting. It's about 18 months old and 16 inches high. It has healthy looking dark green leaves but I can't get it to flower. It's in a 12-inch pot in the garden and gets sun in the morning and shade late afternoon. What am I not doing?
Certified GKH Gardening Expert
It's likely your plant just hasn't matured enough, but this link will help you pinpoint any causes.