Easter lilies will naturalize in Houston gardens. Since they are most effective in clumps of at least three bulbs, I would suggest leaving the baby lilies for now, then dividing in the future when the plants are overcrowded or the flowers diminish in size. The ideal time to divide is in the fall when the foliage has yellowed. Those who receive a potted Easter lily that has been forced into bloom for the religious season can transplant the bulb in the garden in an area with bright light or morning sun and afternoon shade. Lilies like their heads in the sun and their feet in the shade.
Good drainage is important.
A raised bed of moist, organically enriched, loamy soil that is neutral to slightly acidic is ideal. Place the bulb on a handful of sand in the hole, spread the roots, cover with soil, water and mulch. After flowering, leave the stalk and foliage until yellowed, then cut back to 3 inches above ground. Mail garden questions to Kathy Huber, garden editor, Houston Chronicle, P.O. Box 4260, Houston, TX 77210. The bulk of mail prevents individual replies to each unpublished letter.