I have tried several times to overwinter one in my pots, but perhaps you will have better luck in the ground.

well, I sure hope so
It grew *a lot* and I'd really like it to flower and seed itself around next year

Wow! Why did I not know this even existed? Hardy to z3? What about heat tolerance?

Did well baking in my rock garden-- full sun, south-facing slope, dry heat high 90s--low 100s
Had to keep cutting back that lovely flowering weed you can see there trying to smother it.

Currently under snow, so we'll see how it handles winter

Interesting info on plant: http://www.robsplants.com/plan...