Answer: The dark spots on your avocado leaves may be environmental stress and not a disease. Be sure there are no cold drafts around the plant, it's well watered and the pot is big enough for hte leaves. Also, starting in March, feed the tree with a mild liquid fertilizer. Check the leaves for any signs of insects suc has spide mites or mealybugs and spray insecticidal soap on the leaves if you see them. These trees are tough, so if it makes it through the spring, set it outside to enjoy the summer sun.
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