Prolific summer bloomers that are generally easy to grow, “Stargazer” lilies (Lilium “Stargazer”) make excellent outdoor plants in U.S. Department of Agriculture plant hardiness zones 4 through 9. This particular Oriental lily cultivar produces flowers that point to the sky, hence the name. You can transplant or replant both container- or garden-grown “Stargazer” lilies outdoors. Ideally, perform this task in early spring as the plants reemerge from the soil or in fall when the foliage dies back and is cut.
Water the lilies with 1 inch of water to ensure they are well-hydrated for the transition.
Turn the soil 8 inches deep and mix in 3 or 4 inches of organic material, such as compost, peat moss or leaf mold. Do this in the new planting location that is exposed to at least six hours of sunlight each day.
Remove the “Stargazer” lilies from their current pots, or lift them from their present soil location using a garden fork. Dig about 8 inches deep and cut under the bulbs, adjusting the depth as necessary to ensure you do not damage the bulbs.
Replant the bulbs so the tops are 6 inches deep, spacing them to 12 inches apart. Water the newly planted Stargazer lilies with 1 inch of water.
Apply a 2-inch layer of mulch to insulate the soil and to conserve soil moisture to help the bulbs become established in their new location.