Mahogany trees prefer warm, tropical climates, such as those in USDA hardiness zones 10 and 11. The species "swietenia mahagoni"--also known as the West Indian, Cuban and Florida mahogany--is native to the United States. This species can grow to 50 feet tall, with an equally large spread and canopy, making it ideal for creating privacy screens and windbreakers along your property line. If you already have mahogany trees on your property, you can harvest their seeds for propagation.
Harvest seeds from a mahogany tree, or purchase them from a garden centre or nursery. If you are harvesting your own seeds, wait until the seed pods turn brown, harden and crack open while still on the trees.
Prepare planting pots by filling them with a mixture of equal portions of vermiculite and peat moss. Water the planting medium so it's just moist. Plant two seeds to a depth of 1/4 inch in each pot.
Cover the planting containers with cling film to create a greenhouse-like environment in each pot. Place the pots in a sunny spot during the germination period. Water the seeds as necessary to keep the soil moist, about every two days. Be careful not to overwater. The seeds should sprout after about three weeks.
Move the seedling to a bigger container after about two months, when the plants have two or three pairs of leaves. Continue watering the plants regularly to keep the soil moist.
Transplant the saplings into the ground after six months. Prepare the planting area, which should be in partial shade, by digging holes as wide as the planting containers, but 3 inches deeper. Pour 3 inches of compost in the bottom of the hole before planting. Fill in any gaps with soil. Tamp the soil down, then water until the soil is damp.