A native of India, neem is an extraordinarily hardy tree that thrives in ecosystems ranging from the Sahara Desert to the wet salty environment of the Florida Keys. In Florida and other tropical climates, neem quickly becomes a valuable shade tree, growing up to 10 feet per year under optimum conditions. In colder climates, neem can easily be grown in large pots, spending winter months in a sunny window and summers outdoor. A potted neem tree is a highly decorative plant that actually repels pests such as scale and spider mites that can kill common houseplants like ficus or palm trees. Even novice gardeners can grow neem because it clearly indicates when it needs water and fertilizer.
Leaves start to droop as the soil dries out, then quickly revive after watering.
We recommend that neem trees be planted in pots as large as can be handled, because they're like goldfish - they'll get as big as their pots allow. If you don't have a compost pile or a favorite potting soil, we recommend Magic Earth from Wal-Mart. While it has very low fertility, its texture is good and it is made from renewable resources rather than peat. For optimum growth, fertilize weekly with fish emulsion at half the recommended rate and use a balanced organic fertilizer monthly while the tree is growing. Neem trees, like many tropical plants, are day-length sensitive and will stop growing in the winter unless supplemental light is provided.