I wish I hadn't...
Well my gardens are so new I haven't really bought or done anything I regret, well other than my inability to plan but I guess mish-mash is my 'style'. So what have you planted or done that you really regret? Also please toss in invasive plants.
I decided to start this because yesterday I just about bought a bellflower and am now reading about how bad they can be. I had an Ajuga but read about them and promptly yanked it.