I'm betting that zone makes a huge difference with aggressiveness of some plants. Nepeta works for me but I'm in 5a (this winter I was in the Arctic....). I've got a small pot of Verbena b in the greenhouse and now, with all the posts about it, am questioning my plant to add it to the big Perennial Garden...hmmm
My big three Hate plants (that I originally planted) are: Bishop's Weed/Gout Weed; Golden Hops, Vinca
