Answer: If you're regularly feeding your roses and no insects are present, the yellowing leaves are probably a sign of overwatering. Daily watering is just too much for your plants. Roses should be deeply watered once or twice a week during the summer months, depending upon the weather. Set a sprinkler beneath your rose bush and let it run for 10-15 minutes. Then don't water again for 4-5 days. This will provide enough moisture to the roots of the plants and will also allow the soil to dry out a bit before the next watering. I think you'll see an improvement in your roses when you follow this watering schedule.
Best wishes with your roses!
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