How Much Sunlight Do Lilies Need?

True Lilies

• Although many plants have common names that incorporate the term "lily," such as Calla lilies or peace lilies, most are not true lilies. True lilies are those that belong to the Lilium genus. They grow from fleshy bulbs, producing stiff, upright stems with narrow, elongated leaves. The bulbs are composed of overlapping scales with no protective outer layer. Each bulb produces a single stem with flowers forming at the tip. Most prefer full sunlight to partial shade.

Asiatic Lilies

• Asiatic lilies grow best in full sunlight, and are the most popular and widely planted of the lilies. They are available in the widest range of colors, in both bright and pastel versions of every color but blue, and some cultivars even have variegated blooms. Asiatic lilies are hardy and quick to multiply, blooming in late May or early June. Most cultivars grow to heights of 2 to 5 feet, although smaller varieties exist that are better suited to container culture.

Oriental Lilies

• Oriental lilies bloom later in the season than their Asiatic counterparts, and their blooms are larger and more fragrant. They flower in mid to late summer, in a range of white, red and pink colors. Although they prefer full sunlight, oriental lilies are not as hardy as Asiatic varieties, and most cultivars require some protection from the hottest periods of direct afternoon sun. Most grow from heights of 3 to 6 feet, although dwarf varieties are somewhat smaller.

Additional Cultural Considerations

• Lilies grow best in soils that are slightly acidic and rich in organic matter, with an ideal pH of 6.5. Well-draining soils are best, as lilies grow poorly under soggy conditions. Plant lilies in spring, summer or fall, depending on cultivar, and mulch well to conserve moisture and decrease weed growth. Asiatic and Oriental lilies also grow well in containers, and both benefit from regular application of slow release fertilizers, ideally a 5--10--10 blend.