I have a free standing wisteria, which is about 50 years old. This year we have a white type fungus growth on the bark. It is in full bud, but we are a little worried about this fungus. We would be grateful for any advice.
Certified GKH Gardening Expert
Treat the plant with a fungicide (like neem oil) and that should fix it, but realize that it could just be dying from old age. Individual wisteria vines normally last 10-20 years.