How Fast Do Lilies Spread

New plants rise from seeds the following spring if conditions are right, but plants may have to grow for two or three years before bulbs form and become large enough to support blooms. Species lilies multiply by seed annually but some hybrid lilies set seed only occasionally.

How quickly do lilies multiply?

Lilies bloom in the spring and summer. They are considered perennials and grow in U.S. Department of Agriculture hardiness zones 2 through 9. Lilies develop from bulbs that multiply every two or three years. Some varieties grow slower than others and may not need division as often as other types of bulbs.

Does lily plant multiply?

Lilies are cold hardy in zones 4-9, so the bulbs may be left right in the garden for the entire winter. Over time, most lily bulbs will multiply and the plants will grow into large clumps with many stems. Lily bulbs don’t mind being crowded and it’s rarely necessary to divide them.