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Lilies are a popular choice for gardeners seeking vibrant, fragrant blooms during the summer months. To maintain healthy plants and ensure continuous flowering, it is essential to know the right time to divide lily bulbs. Proper division not only rejuvenates the plants but also prevents overcrowding, which can lead to reduced blooms and increased susceptibility to disease.
Understanding When to Divide Lilies
The timing of dividing lilies depends on the type of lily and the growing conditions. Generally, the best time to divide lily bulbs is in late summer or early fall, after the flowering period has ended and the foliage begins to yellow and die back. This allows the bulbs to recover before the dormant season and prepares them for vigorous growth the following year.
When to Divide in Spring
Some gardeners prefer dividing lilies in early spring, just as new shoots begin to emerge. This method requires careful handling to avoid damaging the tender growth. Spring division is suitable for certain lily varieties that bloom early or have a shorter flowering period.
Signs That Indicate It’s Time to Divide
- The lily clumps have become overcrowded, with many small bulbs.
- Blooms are fewer, smaller, or less vibrant than usual.
- The plants are showing signs of disease or pests due to poor air circulation.
- The foliage is dying back earlier than expected.
How to Divide Lily Bulbs
Dividing lilies involves carefully digging up the entire clump and separating the bulbs. Use a sharp garden fork or spade to lift the clump from the ground. Gently shake off excess soil and inspect the bulbs for healthy, firm tissue. Discard any that are soft, moldy, or damaged.
Separate the bulbs by gently pulling them apart or cutting with a sterilized knife. Each division should have at least one growing point or “eye” and some roots attached. Replant the divisions promptly to prevent dehydration and stress.
Planting and Care After Division
Replant the divided bulbs at the same depth as they were originally growing, usually about 4-6 inches deep. Space the bulbs according to the variety’s requirements, typically 8-12 inches apart. Water thoroughly after planting and mulch to conserve moisture and suppress weeds.
Continue regular watering and fertilizing to encourage healthy growth. Remove any dead or yellowing foliage in late fall or early spring to prevent disease and pests. With proper care, divided lilies will bloom profusely in the following season, providing vibrant color and fragrance to your garden.