Pineapple sage invasive?
I'm trying to figure out what to do with a pineapple sage plant (probably "Golden Delicious") that has died back with the first frosts we've had. It started out as a tiny little seedling in the spring and morphed into a monstrous 3' high 5' wide monster plant. It looks like some of the taller spikes fell to the ground and rooted new plants a couple feet from the mother plant. It took over half the garden, but was so spectacular I let it go.
If it was just happy in my well irrigated, well drained and horse manure fertilized garden that's one thing. If it's going to come back and I'm going to find it all over my little garden next spring like some mint scourge I need to be a lot more aggressive in my fall clean up!
So how hardy is it (I'm in zone 7a--usually a few nights a winter at 10Ã¯Â¿Â½ or less) and how invasive is it? If I rip it out will it still haunt me?