Spruce Roots - Ask Extension
How deep do the roots of spruce trees grow? I don't want them to grow into my sewer line.
Knowledgebase
Spruce Roots #919505
Asked October 08, 2025, 12:47 PM EDT
How deep do the roots of spruce trees grow? I don't want them to grow into my sewer line.
Kent County Michigan
Expert Response
Good Afternoon,
Spruce trees typically possess shallow, wide-spreading root systems, with the majority of roots found in the top 12 to 24 inches of soil. Michigan State University Extension states that for most trees, including spruces, approximately 80% of roots reside within the top 18–24 inches of soil.
Spruce Trees in Montana - Urban IPM | Montana State University
Planting a tree successfully requires the correct planting depth - Gardening in Michigan
The article at the link below explains the method, and the difficulties associated with doing research to find an accurate relationship to above ground tree features and root spread.
https://www.isa-arbor.com/Portals/0/Assets/PDF/research/educ_Portal_RootGrowth_AN.pdf
I hope this helps. Thanks for using our service.
Spruce trees typically possess shallow, wide-spreading root systems, with the majority of roots found in the top 12 to 24 inches of soil. Michigan State University Extension states that for most trees, including spruces, approximately 80% of roots reside within the top 18–24 inches of soil.
Spruce Trees in Montana - Urban IPM | Montana State University
Planting a tree successfully requires the correct planting depth - Gardening in Michigan
The article at the link below explains the method, and the difficulties associated with doing research to find an accurate relationship to above ground tree features and root spread.
https://www.isa-arbor.com/Portals/0/Assets/PDF/research/educ_Portal_RootGrowth_AN.pdf
I hope this helps. Thanks for using our service.
Thank you for your help. It's greatly appreciated!
Dee Wilson-Ross
