Care for a neem tree by placing it in a location with indirect sunlight and well-drained soil, feeding it regularly with diluted fish emulsion, and watering it only when the soil completely dries out. In areas where winter temperatures drop below 40 degrees Fahrenheit, plant the neem tree in a pot that can be taken indoors during cold weather.
Start by planting your neem tree in a suitable location that has dry, hot weather and sandy soil. Although young neem trees need indirect sunlight at first, they can tolerate direct sunlight and temperatures up to 122 degrees Fahrenheit when grown. Use good, well-draining potting mix or sandy soil with a 5 to 8 pH, although a 6.2 to 7.0 pH level is optimal. Avoid damp and clay soil, which can cause root rot in the plant.
Water the tree once the soil dries out, and feed it with 1/2 tablespoon of fish emulsion diluted in 1 gallon of water every week during the growing period. Because neem trees can reach up to 75 feet tall, prune your tree regularly to keep it small enough to live in a pot. If the climate permits and temperatures don't drop below freezing, plant it in the ground in a sunny area.