I live in Phoenix, Az and have a wisteria vine. It's about four years old and has yet to bloom. It's healthy as can be, but no flowers. Is there anything I'm not doing or could do to make it flower?
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: https://www.gardeningknowhow.com/ornamental/vines/wisteria/wisteria-blooming-problems.htm