I have a small citrus tree which I keep indoors in the winter. It is now out side an appears happy. The leaves that were on the tree are spotted- with pale great spots. The newer leaves which have developed since being outdoors are fine and shiny green' Is there something i should do about the older spotted ones?
You can send us photos of the whole tree and photos of the affected foliage so we can see what you may be dealing with.
Check the plant for signs and symptoms of insects. Citrus trees can be susceptible to sucking insects like scale http://extension.umd.edu/hgic/scale-insects-houseplants,
spider mites http://extension.umd.edu/hgic/spider-mites-houseplants, and mealy bugs http://extension.umd.edu/hgic/mealybugs-houseplants.
Outdoors citrus like bright light during the summer. Give actively growing citrus a high-potash, tomato type fertilizer every two weeks. The plant may need repotting. Move plants into containers one size larger each spring until maximum pot size is reached. See more