My Knockout Roses are not doing well; need advice!
Maryland, United States
Last summer I put in two Knockout Rose bushes. I have prepped the soil (all clay) by digging down about 20 inches and backfilling with sand, rocks and humus/manure to make sure they would not be too wet. I even mounded them up a bit but with the heavier rains this spring, I believe they are too wet. They seem to have "rust" spots, they are quite spindly and pale colored. Also, the stems are blackened in some spots. They did bloom but, after the last heavy rain, they have not bloomed again. I also had a lot of trouble with caterpillars and mites in late May. I have trimmed them down and fed them but I am not sure what else to do for them. They get sun all day (East-West) esposure. They are surrounded by rock pavers but I heavily mulch them to provide enough acid. In the picture they are near the top left, in front of the day lillies.
- 18 Jun, 2009