Dividing Tree Lily Bulbs: Learn How And When To Divide A Tree Lily Bulb

By Mary H. Dyer, Master Naturalist and Master Gardener

Although tree lily is a very tall, sturdy plant at 6 to 8 feet, it isn’t actually a tree, it’s an Asiatic lily hybrid. Whatever you call this gorgeous plant, one thing is sure – dividing tree lily bulbs is about as easy as it gets. Read on to learn about this easy method of propagating lilies.

When to Divide a Tree Lily Bulb

The best time to divide tree lily bulbs is in autumn, three to four weeks after blooming and, preferably, a few weeks before the first average frost date in your area, which allows time for the plant to establish healthy roots before the first cold snap. A cool, dry day is healthiest for the plant. Never divide lilies when the foliage is still green.

As a general rule, divide tree lilies every two to three years to keep tree lily plants neat and healthy. Otherwise, tree lilies require very little care.

How to Divide Tree Lily Bulbs

Cut the stems down to 5 or 6 inches, then dig around the clump with a garden fork. Dig about 12 inches down and 6 to 8 inches from the clump to avoid damaging the bulbs.

Brush off the dirt so you can see the divisions, then gently pull or twist the bulbs apart, untangling the roots as you work. Discard any rotted or soft bulbs.

Cut the remaining stem just above the bulbs.

Plant the tree lily bulbs immediately in a well-drained location. Allow 12 to 15 inches between each bulb.

If you aren’t ready to plant, store the tree lily bulbs in the refrigerator in a bag of moist vermiculite or peat moss.

Print This Article
This article was last updated on
Did you find this helpful?
Share it with your friends!

Additional Help & Information

Didn't find the answer to your question? Ask one of our friendly gardening experts.

Do you know anything about gardening? Help answer someone's gardening question.

Read more articles about Lilies.

Search for more information

Use the search box below to find more gardening information on Gardening Know How: