How do I fix oversaturated soil?
Written by
Nguyen Minh
Reviewed by
Prof. Martin Thorne, Ph.D.Oversaturated soil can suffocate the roots of plants by replacing air cavities in the soil with water. This can occur when drains are unable to manage excessive water inflow, particularly after prolonged periods of heavy rainfall. I've saved flower gardens with standing water, where some of the mature plants ultimately died from waterlogging. Time is of the essence in preventing root rot and soil structure collapse.
Soil Amendments
- Mix coarse sand at 40-50% volume ratio
- Add perlite to improve aeration immediately
- Incorporate compost to boost microbial activity
- Apply gypsum for clay soil structure improvement
Structural Changes
- Build raised beds 6-12 inches high
- Create swales to redirect surface water
- Slope ground away from structures
- Install subsurface drainage pipes
Plant Solutions
- Plant willows for high water absorption
- Use rushes in permanently wet zones
- Grow moisture-loving vegetables like taro
- Establish cover crops for soil stabilization
Install French drains in extreme instances when water collects for several days. I have utilized this solution for clients who have clay-heavy yards. Dig a trench, sloping 1% toward the drainage area. Fill with gravel and then a perforated pipe. Then cover with landscape fabric to detect clogs.
Raised beds provide quick access to vegetables. Build sides 8-12 inches high out of untreated wood. Fill with a well-draining mix of topsoil, compost, and sand. I get vegetable production from my raised beds even in Utah's wet springs.
Avoid soil compaction to prevent future problems. Avoid driving machinery on wet ground completely. Maintain an organic matter ratio of at least 5%. Annually check drainage using the percolation method. I dig a 12-inch hole and fill it with water, allowing for time drainage.
Read the full article: 7 Proven Water Retention Soil Methods
