Lilac Bushes

Lilac Tree Roots

Anonymous added on January 25, 2011 | Answered

I have a lilac tree. It's about 9-feet high.  I have it planted 6 feet from my neighbor's wall.  They are worried the roots will damage their foundation. Can you tell me if this will do that?

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Certified GKH Gardening Expert
Answered on January 25, 2011

It is highly unlikely that the lilac will cause damage to a foundation. They have very non-aggressive root systems and this is why you often see them used as foundation plants. The only way that it could be a threat (and even then, the plant would probably die before it did damage) would be if the roots were restricted tightly, as in there were only a few feet for the roots to grow in. That does not sound like the case where you are, so the lilac is not a threat.

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