liatris ligulistylis sale! for monarchs
this goes through labor day. great deal on plants. not sure how much shipping is. I bought mine through prairie nursery a few springs ago and they are a reliable nursery.
I have transplanted liatris in the fall and it has always grown back. good luck!
it says up to zone 6 but I have read zone 8 elsewhere. Also, we experienced our 4th hottest July on record and ours grew just fine. very hearty once established
Here is a link that might be useful: Liatris Ligulistylis plants