How do you treat yellow leaves on rhododendrons to improve their health and appearance?

To treat yellow leaves on rhododendrons, you can improve their health and appearance by addressing potential causes such as overwatering, nutrient deficiencies, or improper soil pH. Adjust watering practices, fertilize with a balanced fertilizer, and ensure the soil pH is suitable for rhododendrons. Pruning dead or diseased branches can also help promote new growth and overall plant health.