Answer: Browing leaves can indicate overly dry soils, too much ferilizer, or over-exposure to hot sun on tender new leaves. If the browning leaves are concentrated on the new growth, I'd suspect sunburn. As the plants and leaves mature, this shouldn't be such a problem. If you've fertilized recently, you may have over-done it; if you're not watering deeply once or twice a week, the affected roses may be telling you they're thirsty. Hope this information helps you determine the cause of the problem.
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