The leaves and branches are dying on our wisteria. It has grown up a pine tree about 50 to 60 feet tall. Has been beautiful since we move in 4 years ago. This year the flowers did produce like before and did not last as long as before.
Certified GKH Gardening Expert
I would check the base of the plant for galls. This is the most common reason for unexpected wisteria decline. Here is an article with more information: