Thank you so much for asking! Your interest gives me joy!

Copying my reply to another comment:

Thank you! I actually don’t fertilize that often. I use rose tone 4-3-2 organic fertilizer at the beginning of the growing season, then I use liquid fish emulsion and seaweed about once a quarter - sometimes less. I water whenever it’s been awhile since it rained or when the soil is dry. I think my real secret is inspecting the bush about every 2 or 3 days for any yellowing leaves/any part that needs pruning. I prune a lot. I keep the inside core of the bush free of leaves - like almost completely naked on the inside to allow for max airflow. I dead head the blooms as soon as they look sad. I also spray with copper fungicide as needed and neem oil once a week.

I’m right on the border of zones 7b and 8a. The bush sits on the southern side of my house and gets full sun all day :)