What is the best way to get rid of invasive snow on the mountain? It has mutated to all green (it used to be variegated. This was there 30 years ago when we moved in, in variegated form, and had a controlled, slow spread. About 5 years ago it spread throughout the entire bed (about 6 ft x 40 ft) and is out of control. It has turned all green and it is mixed in with the roots of the hostas, solomon seal, iris, astilbe, etc. Pulling it does not seem to help. Has anyone else dealt with this problem before? Thanks in advance for any advice you can give.