Bark-Like Clusters on Wisteria Vine
We have a wisteria vine that is about 5 years old. This year, we noticed wood bark-like clusters that are growing on the main vine as well as they shoots. The clusters are all over the vine and are brown in color (no white powder). We thought at first they were wasp nests but it isn't. The vine has both blooms and green growing but these clusters are multiplying. Any idea what this is and how to rid the vine of these "tumor" like growths?
Certified GKH Gardening Expert
It sounds like an issue with gall (kind of like a tumor for plants), most likely crown gall. Here is more information: https://www.gardeningknowhow.com/ornamental/vines/wisteria/wisteria-diseases.htm, https://www.gardeningknowhow.com/plant-problems/disease/how-to-fix-crown-gall.htm