Recently bought a house that has an established wisteria plant. I noticed at the bottom of the vine and throughout the bush on random branches in vary sizes are hard tumorous growths. The nursery said it was a conk and, yet, any pictures I see doesn't look the same. And if I look at galls, it's the same. Maybe it's just a varing type of conk/gall? The bush is old and looks healthy. Should I be concerned?
Certified GKH Gardening Expert
The plant could be suffering from crown gall. These articles will help determine if this is the issue: https://www.gardeningknowhow.com/ornamental/vines/wisteria/wisteria-diseases.htm, https://www.gardeningknowhow.com/plant-problems/disease/how-to-fix-crown-gall.htm