My wisteria vine is in a pot. At the end of some branches, the leaves are dead. Some branches have not leafed out at all. I live in AZ, elevation 3,500 ft. I did not find any gall. I do have petunias with it in the same pot. Would that affect the vine? It gets regular water. I read your article about wisteria problems. Too much fertilizer may be why it's not blooming, but I'm most concerned about the sparseness of leaves.