How to level an uneven lawn
An uneven lawn has two different types of problems that require different solutions. Low spots that create drainage problems or catch standing water need grading -- moving soil to change the grade. Surface irregularities (bumps, settled areas, slight waves) can often be improved with topdressing..
An uneven lawn has two different types of problems that require different solutions. Low spots that create drainage problems or catch standing water need grading — moving soil to change the grade. Surface irregularities (bumps, settled areas, slight waves) can often be improved with topdressing. Confusing the two leads to disappointment: topdressing can't fix a slope or redirect drainage, and regrading is overkill for a lawn that just has a few high and low spots from foot traffic.
Identify the type of problem
Per Penn State Center for Turfgrass Science:
| Problem type | Cause | Solution |
|---|---|---|
| Surface waviness, minor high/low spots | Soil settling, traffic, freeze-thaw | Topdressing over growing season |
| Depressions 1—3 inches deep | Localized settling, removed tree root decomposition | Lift sod, fill, reset |
| Depressions > 3 inches | Major settling, removed stump, buried organic matter | Excavate and refill |
| Standing water, drainage problem | Grade issue or hardpan | Regrading, French drain, or both |
| Whole lawn grading off | Original grade error | Professional regrading |