Choose an outdoor location with full sun for six to eight hours every day, quick site drainage and good air circulation. Allot 12 to 18 inches of space for each Easter lily plant.
Amend natural soil or mix potting soil, depending on your planting choice. Mix 2 inches of organic compost and 2 inches of peat moss into the top 10 inches of soil in an outdoor bed. Mix equal parts peat moss, quick-draining potting soil and organic compost for potting. Add granular 10-10-10 fertilizer to the soil per manufacturer directions.
Turn the existing Easter lily pot on its side and tap it to loosen the potting soil. Pull the lilies from the pot, loosen the soil ball and separate the lilies at their roots for planting.
Plant each Easter lily in its new potted or outdoor location, at a depth equal to its old planting depth. Plant amended or potting soil around the base of each plant to secure the planting.
Water each lily with 2 inches of water to settle the soil around the roots, and put the plants on a regular schedule of 2 inches of water every week. Use 1 to 2 inches of organic mulch on the soil around the plants to conserve moisture and soil temperature.