Check out Lamiastrum goleobdolon

Check it out and then decide if you have several acres for it to go berserk in. The cultivar Hermans Pride is a clumper rather than a runner.

agree!!!

Thanks for the responses. Having a hard time locating plants locally, is it possible to get seeds?

If you want Hermanns Pride you can't grow it from seed. Mail order is the only way if you can't find it locally.

If you are looking for L galeobdolon. I really wouldn't advise it. I've never seen seed for it. Most people get it by unsuspectingly accepting passalongs.