Hey, I was hoping someone might be able to tell me what's going on with my wisteria. I got it from a good nursery and it bloomed the first year and got huge but a few years after it started dying back from the top after blooming like crazy, defoliating, and then leafing out again. I can't figure it out. First I thought it died because it outgrew the small area of soil it was in and then I noticed a lump at the base of the stem which is photographed below. I don't know if that has to do with anything. Regardless it regrew from the base a fair amount but a few leaves have died back and I noticed they look a little funny. This could be nothing but I figured I'd put the pictures up in case anyone recognized the problem.

(new growth seen in upper left)