How do you care for a wisteria tree?
When and how do you prune a wisteria tree?
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It is best to prune wisteria in late winter and to remove about half of the prior year's growth. You can get some pruning tips at https://www.hometalk.com/diy/grow/flowers/magnificent-wisteria-easy-pruning-for-spectacular-blooms-1216792
https://www.gardeningknowhow.com/ornamental/vines/wisteria/growing-wisteria-proper-wisteria-vine-care.htm
https://www.bing.com/videos/search?q=how+do+you+care+for+a+wisteria+tree%3f&qpvt=how+do+you+care+for+a+wisteria+tree%3f&FORM=VDRE
http://www.growingwithplants.com/2013/05/growing-awesome-wisteria.html
Yep, call The Professional. You have to get rid of the moisture. That's absolutely Step 1.