Dwarf Maple Germination:
1) Put the seeds in a heat-proof container and pour hot water over them. The water temperature should be no higher than 110 degrees Fahrenheit. Let the seeds cool as with the water and allow the maple seeds to soak for at least 24 hours or up to two days.
2) Drain the water and place the seeds in a plastic bag filled with peat moss or vermiculite. Moisten the mixture with a small amount of water. Poke a few small holes in the bag to allow for air circulation.
3) Put the bag of seeds in the refrigerator for approximately 90 days. This stratification process breaks down the seed coats and prepares them for germination. When you remove the seeds, you may see small roots growing from the tips, indicating that the seeds have begun to germinate.
4) Fill 4-inch pots with potting mix and sow the seeds on the surface of the soil. Cover seeds with three-eighths inch of soil.
5) Water the seeds until the soil feels moist. Let the soil dry out before watering again to prevent rotting.
6) Watch for seedling emergence with one to two weeks. When seedlings emerge, provide light shade to prevent burning.