Lawn Grading for Drainage: Minimum and Maximum Slopes

Minimum Grade

Hard surfaces: 1 inch drop per 8 ft. Lawns: at least 2 inches per 8 ft. Beds: more.

Comfortable mowing limit: 1 ft drop per 3 ft horizontal (33%). Steeper = dangerous when wet. Adjust for comfort and safety.

Lawns: New Sod Puddles & Sidewalk Flooding: Adjust Irrigation Runtime First; Improving Lawn Drainage on Clay Soil Without Starting Over; French Drain Not Flowing: Groundwater vs. Surface Water Diagnosis; Lawn Killed by Rogue Herbicide in Hawaii: Soil Test, Then Hybrid Bermuda Sod; How to Apply Sugar to Your Lawn: Step-by-Step; Protecting Older Engines from Ethanol Fuel Damage; Fixing Perpetually Wet Low Spots in the Lawn: Why Drainage Pipe Beats Surface Sand; Lawn Drainage Solutions: From Simple to Engineered; Fixing Bare Spots Under Play Equipment Without Wood Chips; Adjusting Soil pH for Centipede Grass in Sandy Florida Soil

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