Best way to kill Wisteria? I built a deck in my backyard about a year ago. Last week one wisteria shoot sprung up through the deck boards. I can't tell you how depressed I got because I know from experience how hard wisteria is to remove and how much it can get out of control. Here is the bigger problem: I cannot physically get under the deck to the source (I'm not even sure where the source is!) The 1/4" - 1/2 " space between the deck boards is my only access to the ground underneath the deck. Is there any way to kill the wisteria by applying something to the leaves of the shoot? I am deserate for any ideas you might have. Thanks so much for your consideration.