Any thoughts? I bought a few 1-gallon roses in early June. Planted all in large planters, used a good granular rose food, Epsom Salts and regular watering. Chrysler Imperial never bloomed. I even sprayed it with a bloom booster water soluble fertilizer a few times.
It is now over 5 feet tall and about 3 feet wide. A bit a mildew, but not too bad.
Has this happened to any of yours?