I can't imagine why you can't cut down a few stems after the plant blooms. The one negative is that cutting down some stems to the base may end up forcing more new growth so you may end up back to square one.
Is there multiple branches at the soil line? How about dividing it in the fall to make two or three new smaller plants, some of which you can then give away, sell or trade? Cricket Hill has good info on dividing.
https://crickethillgarden.word...
Someone else correct me if I'm wrong please.
Gorgeous plant, it's on my wish list but I have not found a supplier in Canada.
