How can I get rid of this? I'm at fault for buying 1 measly little plant a few years ago, but now it has spread fall and wide, and actually is choking out my iris.
I have tried digging it out, but those bulbs are crammed in tight, and I can't get them all. It's already too tall to smother.
The bed it has invaded is supposed to have iris, salvia, nepeta, baptisia, roses and ornamental grasses. Last season, I was out of town during bloom season, so this plant bloomed and spread seeds everywhere.
Help?
