Smallish, white tubular blooms tipped with crimson appear mid-summer.  Flowers are arranged in whorls.  Blooms heavily its first year from seed.

Big, big, big.  Grew seven feet tall and 4 feet wide its first year from seed.  Many stems per plant. We grow it in full sun.  

Squarish stems (it's a mint), which have an interesting groove running down the middle of each side.

Thompson & Morgan's catalogue is the only reference I have seen of this plant.  They list it as hardy to zone 5.  T & M are quite conservative in their hardiness ratings, this plant may be hardier than zone 5.

For the love of God, do NOT let this fellow go to seed in your garden. Hundreds of seedlings the next spring in your garden will be your punishment.

Haven't been able to overwinter this yet, but is interesting enough (ridiculous self-seeding aside), that I'll continue to grow from seed a couple of plants each spring to have it in my garden each year. Upate (a few years later) - no I won't. don't ever want to see these in my garden again, am weeding out tons of seedlings from them each spring. Grrrr.

Glen's score:  3.