If your site is level and the soil heavy, then prepare raised beds for the bulbs. Take care not to damage the roots in planting. P.M. Filtered sunlight or semi-shade may bring out the more delicate colors, but they tend to make weak stems and soft flowers. Do not plant near house walls, walks or drives that reflect sunlight or heat. All others need four inches of soil over them.
Lilies are gross feeders and root deeply.
They like a good mulch of rich compost or decaying leafmold, and this can be applied several times during the growing season. Shallow-rooted ground cover keeps the ground shaded and is beneficial. Do not expect your lilies to compete with strong-growing perennials, shrubs, or trees. Cutting the flowers only, preventing them from setting seed, is beneficial. Cutting the foliage is harmful in direct proportion to the amount taken.