I grew this from seeds and they are sprouting up everywhere (been pulling them out from lawn). It is a monster!!! This is the second year for it. Someone should have warned me...
I plan to chop it down soon.
I'd think that any of the cold hardy varieties would become monsters in your zone. At least they are prettier then dandelions.
Just need a safe place to plant them where they cannot invade your other plants. If I can find one that loves to grow I would love to plant them along side my home where nothing like to grow.