My wisteria vine puts out less and less blooms each year. The vine base/root is shaded, but the vines are in full sun all day. It gets fertilized and watered as suggested. HELP.
Poor Wisteria Blooms
Certified GKH Gardening Expert
I would guess that the nitrogen to phosphorus ratio is off. Even though you fertilize, without the right amount of phosphorus, it can't bloom well. Bone meal is a great way to add phosphorus. This article will also help: