Gather mamey sapote seeds from a ripe fruit. Complete this step when you're ready to plant, as these seeds don't store, losing their capacity to reproduce within about one week.
Place the seeds between two cutting boards. Press gently on the top cutting board to crack the seeds. According to the University of Florida, mamey sapote seeds that have a thin crack in their coat germinate faster.
Fill small pots with seed-starter mix. The pots have to be deep enough to accommodate a 2 1/2-inch long seed.
Plant the seeds and cover them with a layer of seed starter mix.
Water the soil uniformly. Don't allow the seeds to dry out during germination.
Cover the seeded pots with a piece of clear plastic film. Remove it as soon as the seedling sprouts.
Transfer the seedlings to bigger pots as they grow. Transplant the saplings outdoors when they're 2 feet tall.