Lilac roots - Knowledgebase Question

Helena, MT
Avatar for paspinwa
Question by paspinwa
July 7, 2006
I have a spot in my front yard in which I'd like to plant a lilac bush.
How deep do lilac roots go since there is a sewer line from my house to the street approximately six to seven feet under ground level. Will the lilac roots interfere with that line? Thanks.

Answer from NGA
July 7, 2006
Roots from a lilac bush will generally remain in the top 18-24" of soil but they may spread out a bit (it's a natural tendancy for these plants to colonize an area). I wouldn't be at all concerned that lilac roots might invade a sewer line that is 6-7 feet deep.

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