Why Are My Azaleas Yellow. For azaleas a decidedly acid-loving plant a serious iron deficiency caused by the pH of the soil being too alkaline can bring on chlorosis. Yellow leaves on your azalea can also be as a result of root rot Phytophthora due to soil that drains too slowly.
However they are subject to a number of problems caused by infectious agents insect pests weather and nutrition deficiencies. It does not like hot and dry summers as well as rainy and wet seasons as well as being left under the sun for a long time. Now theyre both almost completely yellow.
For azaleas a decidedly acid-loving plant a serious iron deficiency caused by the pH of the soil being too alkaline can bring on chlorosis.
Spider mites and other pests can also be a reason why the leaves of the azaleas turn yellow when it is not yet expected to. For azaleas a decidedly acid-loving plant a serious iron deficiency caused by the pH of the soil being too alkaline can bring on chlorosis. The veins of the leaves remain green but the rest of the leaf turns brilliant yellow and finally paper white. When the soils pH is high the plant cant take up the iron and the formation of chlorophyll slows and leaves turn yellow.