I have a wisteria vine that is about 5 or 6 yrs old. Although it is full and luscious, it does not get any of the purple blooms. Why is that? Thanks for your time!
Wisteria Vine Blooms
Certified GKH Gardening Expert
I would guess that the nitrogen to phosphorus ratio is off. The soil may have an abundance of nitrogen, which would result in nice, healthy green growth but little to no blooms. Without the right amount of phosphorus, it will not bloom well. Bone meal is a great way to add phosphorus. This article will also help: