I Have a Very Old Wisteria That Has NEVER Bloomed
I have a very old wisteria that has NEVER bloomed. Why is that?
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
Pruning may also help: https://www.gardeningknowhow.com/ornamental/vines/wisteria/pruning-wisteria.htm