Answer: The curling brown leaves you're describing could be sunburn, or they could be caused by root damage due to poor drainage. Rhodies must have acidic, well-draining soils. Keeping the soil constantly moist will cause root rot. I'm afraid that curling, drooping leaves is a sure sign of phytophthora root rot - caused by poor soil drainage, poor nutrition and improper soil pH. The disease will remain in the soil - don't replant a rhodie in the same spot or it will suffer the same fate. There is no cure - I'd remove the plants and put something else in their places.
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