Powdery mildew also grows rapidly in dry conditions.So to control mildew for real you need air flow and no contamination.Humidity has little to do with its growth its about air flow.
Nice plants but rh has nothing to do with powdery mildews growth it grows in all conditions.Oh I wasn’t speaking in regards to mildew... just want his ladies to be able to breathe.
Trust me... I believe in airflow. Lol!
But RH is very important too.
I tend to go overboard. Lol!
No mildew in there. Lol!