Hello, like the previous readers said, some roses like full sun and most hydrangeas like shade. HOWEVER, one combination works perfectly together. How do I know, because this combo on the side of my house which has full sun light. You can use limelight hydrangeas and knock-out roses. I alternated the two and they both grow at least 5 feet if not more. I keep my babies pruned to that height. I get numrous compliments from the neighbors!
Q