I would like to limit height to about 6 feet this year. I've never tried heading them back, but I am assuming that if I cut the new growth back it will force lateral development and limit height. But...what if that's not how it works out, lol.
Has anyone tried keeping it short that way?
Thanks, Alana

Yes. It does work and the flowers are smaller.

Thanks. I won't mind the reduced flower size.