Anybody have any experience growing this? It's my first violet, and I love it--a gorgeous plant, with beautiful, deep black flowers. I do, however, need to know how aggressive it's going to be in a moist perennial bed with afternoon sun. The soil surrounding is clay, and I've amended a deep site for it with peat. It borders on a similarly amended site for a Dicentra. Will it invade that site? Will it invade the lawn, for that matter?