Many plants, such as the canna lily and the peace lily, have 'lily' in their name, although they aren't true lilies. True lilies belong to the Lilium genus, which has more than 100 species. Although generally grown from bulbs, lilies can be propagated from from seeds. Some varieties will bloom within 18 months of planting the seed, according to the North American Lily Society.
Fill the 4-inch planting pots to within 1 inch of the rim of the pot. Add a one-fourth inch layer of peat moss and water the soil until the water drains from the bottom of the pots.
Place the lily seeds, one-half inch apart, on top of the peat moss and cover with a one-half inch layer of moistened peat moss.
Place the pots in a warm place and keep the soil moist. The seeds should germinate within two weeks.
Place the pots in an area with bright light, but out of direct sun, once the seeds have germinated.
Fertilize the seedlings for the first time when all of them have germinated. Use a balanced fertilizer diluted to half the strength recommended on the package. Repeat the procedure every two weeks.
Transplant the seedlings into the next size larger pot when they have their third set of leaves. Plant each one in its own pot, filled with equal parts of vermiculite and standard potting soil. Move them outdoors to a shady area in the fall.
Allow the lilies to grow in pots in an area with filtered sunlight until they are two years old, at which time they can be planted into the landscape in the spring.