I'm in zone 6. We have extremely high humidity throughout the summer. And mid 80s to low 90s. Both my Winchester Cathedral and Molineux from DA have been the best growing bushes of my bunch. Not only flowering but growth wise as well. I planted WC from a 1gal it was about 14" tall. And maybe a foot wide. It's now almost 6ft tall on some canes. Loaded with buds. And 3ft wide. In about 4 months roughly in the ground. My molineux has RMV and still growing wonderfully.