Planting over a septic system’s leach field can be a challenge because every drain field is unique. But, there are a few hard and fast rules to what can be planted. You decide what will work best in your situation by following a few simple guidelines:
If possible, plant between the drainage lines and at the ends because it will be dryer.
For larger trees (30 feet or taller), plant, if possible, the same number of feet away from the leach field as the tree is tall at its maximum height (i.e. plant a 50 ft. maximum height tree, 50 feet from the leach field.)
Trees and Shrubs that are OK to plant near/within a leach field:
Dogwood (tree and shrub)
Serviceberry (tree and shrub)
Perennials that are OK to plant near/within leach fields:
Do NOT plant the following trees within your leach field: