Lilac Bushes

Lilac Root Growth

Anonymous added on September 1, 2011 | Answered

Are lilac root systems invasive to water/sewage lines? We are being told that my mother's lilac bush' roots have grown into the neighbor's sewage lines, causing backup.

Share this Question:
Log in or sign up to help answer this question.
Check here if you would like to receive notifications every time this question is answered.
You are subscribed to receive notifications whenever this question is answered.
Certified GKH Gardening Expert
Answered on September 2, 2011

Lilac roots will grow into sewer lines, depending on the variety you have. For example, shrubs usually have more shallow root systems than tree forms. The roots will follow the path of least resistance where water, air and nutrients exist. Planting the lilacs 8 to10 feet away from the sewer line should be more than enough distance. As a general rule, tree roots will extend up to 2.5 times the height of the tree, and some species of trees may have roots extending five to seven times the height of the tree.

Was this answer useful?
Looking for more?
Here are more questions about Lilac Bushes

You must be logged into your account to answer a question.

If you don't have an account sign up for an account now.