I have a large wisteria bush that is probably about 5 yrs old. It bushes and branches out, and I prune it back throughout the growing season, really pruning it after the first freeze. The problem is that it only gives a few blooms. I would like to see it bloom like the ones in the magazines. How do I get my wisteria to produce more flowers?
Certified GKH Gardening Expert
I would guess that the nitrogen to phosphorus ratio is off. Even if you fertilize, 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: https://www.gardeningknowhow.com/ornamental/vines/wisteria/wisteria-blooming-problems.htm