Clarification on planting near a mound septic system
- Do not place trees and shrubs ON the mound; they may be planted at the foot or on side slopes. Frame the mound with trees and shrubs at a distance, but use only herbaceous (non-woody) plants on the mound itself. Trees should be planted a minimum of 20 feet from the edge of the mound. Trees known for seeking water reservoirs, such as poplar, maple, willow and elm, should be planted at least 50 feet from the mound. Shrubs should not be planted on top of the mound.
Go here to read the complete bulletin:
Ramsey County Minnesota
First, we apologize for the broken link. The University of Minnesota Extension website is undergoing a large renovation this summer and many of the links are broken.
Tree roots can grow "up", so the rule of 30 feet away should be adhered to. Here are some publications from other states' Extension Services that might be helpful. Use caution when choosing a recommended plant from these lists that the plant is appropriate for Minnesota: