Brown Spots on Azalea Leaves

I have a azalea plant that i’ve had in the house all winter. It has brown spots on the leaves. They don’t seem to go away and they end up falling off. What can I do and what am I doing wrong?

Brown spots on indoor Azalea leaves are pretty common.

If they are round brown spots on both the top and bottom sides of the leaves they are usually caused by a fungal disease known as Colletotrichum Azaleae. Other causes could be: too much or too little light, too much or too little water, or the wrong plant food.

Here are a few care instructions:

These are iron loving plants so give them a plant food that has nitrogen and iron in it.

Keep the soil barely moist but never soggy.

Put your azalea in indirect light, no direct sun.

If you think it’s the fungal infection, purchase a commercial FungicideFungicides are chemical compounds that are used to kill or inhibit fungi or fungal spores. Fungi can cause serious damage to your houseplants. for azaleas.


Read about Azaleas in the Popular HousePlant section of the website. Remember, azaleas are poisonousPlants are a great addition to homes and offices, but it’s important to know whether your plants are dangerous to children, pets, or even adults. Some plants contain chemicals such as oxalates, solanine, glycosides, or alkaloid lycorine that may cause vomiting, nausea, diarrhea, swelling and redness of the mouth, throat, and lips, and trouble breathing. Touching parts of certain plants, especially the sap, may cause various skin irritations. The weight and age of the human or pet involved, and the part and amount of plant eaten determine how severe the reaction to the toxins will be. Although plants may be listed as non-toxic, they can still cause individual allergic reactions. If there is any question after a houseplant has been ingested or touched immediately call the Poison Control Center 1-800-222-1222 The Handbook of Poisonous and Injurious Plants [Paperback]is an excellent reference to keep around if you have young children and pets.!