I asked on another forum, it seems to be moving very slowly. I have very rich soil. I am wondering will the roots of this plant takeover my garden like mint?
I doubt it. Have only seen this growing in the wild but it's not the type of plant that takes over large areas.
What I heard is that Lead Plant has the deepest roots of all. Fifteen feet or more deep. Really drought protected.
What I have seen in the wild is that they colonize with only a few plants. Not hardly an invasive.