The Best Soil for Asiatic Lilies

Soil

• Asiatic lilies thrive best in a fertile, acidic-to-neutral, well-drained soil, as cited by the University of Minnesota Extension. Amend clay or sandy soil with organic matter before planting and create a raised bed in clay soils to improve drainage. The addition of organic material in sandy soil keeps the ground from drying too quickly. Avoid planting in poorly drained sites or in areas where water tends to collect.

Mulch

• The addition of mulch to soil also helps to improve soil quality over time. Apply a 4-to-6 inch layer of mulch over newly planted bulbs as winter protection. Mulch keeps the soil from freezing and lets the bulbs develop their roots over winter. Mulch acts like soil insulation against fluctuating temperatures, conserves moisture and keeps weeds in check. Recommended mulch materials include leaves, wood chips or loose compost.

Fertilizer

• A regular application of fertilizer adds nutrients to the soil on a regular basis. Use a high-phosphorus fertilizer such as a 5-10-10 every spring to fertilize Asiatic lilies. A slow-release formula also works well. It is recommended to follow label directions before using any fertilizer.

Planting Suggestions

• Select an area of full-to-partial sun for planting Asiatic lily bulbs. The plants usually require at least six hours of full sun. Less sun works in areas with very hot weather. If you are planting potted plants, plant bulbs at the same depth at which they were growing in the container. When planting bare bulbs, plant the Asiatic lilies to a depth of about 10 inches. The plants develop roots along the underground stems, and these help to anchor the plants.