Why is my rhododendron going yellow?

If your soil is alkaline, you’ve found one reason for rhododendron leaves turning yellow: mineral deficiency causing chlorosis. These shrubs take up too much calcium and not enough iron in alkaline soils. Chlorosis is very likely when the yellowing is mostly between the veins of new leaves.Click to see full answer. Also to know is, why is my rhododendron turning yellow?When rhododendrons turn yellow between leaf veins it is generally a sign of low pH in the soil. Rhododendrons are acid-loving plants. If they are not grown in soil with proper acidity, the plants can exhibit symptoms of iron deficiency, which causes the breakdown of green between leaf veins, and yellowing.Likewise, what is the best fertilizer for rhododendrons? Liquid or water-soluble fertilizer is mixed with water and then poured into the soil. If you are concerned about cost, granular fertilizer is the best fertilizer for rhododendrons since it is the cheapest. Liquid fertilizer passes quickly through the soil and application must be repeated more frequently. Also, how do you bring a rhododendron back to life? How to Bring a Rhododendron Back to Life Make sure that the rhododendron is in the right location. The shrub prefers the afternoon shade. Check the soil for moisture. Scrape the branch slightly with a knife to see if there is any green colored layer under the bark. Check the rhododendron for fungus disease. Check if the leaves look yellow with a green vein. What is wrong with my rhododendron?The fungus Phytophthora species causes one of the most common disease problems in the landscape for rhododendron and azalea. This fungus is a “water mold,” and thrives in poorly drained or wet conditions. A wilted plant is usually the first sign of trouble. Rhododendron leaves will curl inward and droop.