I love this rose. It blooms all summer long, and I like the way the color changes as the bloom ages. My problem with the plant is that it gets a fair amount of blackspot and also some mildew. This puzzles me because I thought the knock-out roses are supposed to be so disease resistant. I live outside of New York City; we have hot humid summers and my garden is green (no synthetic fungicides). Not sure what to think about this situation. I like Rainbow Knock-Out, but would prefer to grow only varieties that don't have this problem.