Indian hawthorns are very prone to Leaf Spot fungus especially in moist conditions . When looking for Leaf Spot, you will notice yellowing and dark colored spots on the leaves. If this goes untreated the leaves will turn red and fall off. Be sure to remove these leaves from the landscape to avoid spreading. It is important to treat this fungus immediately to prevent thinning, spreading, and possible loss of the plant. Leaf spot fungus needs to be treated with a fungicide. When treating, be sure to spray thoroughly.. Inside and out! It is not uncommon to need more than one application. Let us know if you have any questions!