How to apply lime to lawn?

Proper Lime Application for Optimal Results

Applying lime correctly ensures even pH adjustment and maximum benefit. Improper application results in uneven pH correction, creating patches of varying grass quality. Understanding lime types and application equipment is essential for success.

Lime Types and Selection

Ground limestone is the standard choice—inexpensive and widely available. It contains calcium and magnesium carbonates that gradually raise pH. Hydrated lime works faster but is more expensive and can burn grass if over-applied. Pelletized lime is easier to apply with standard spreaders. Select based on urgency, budget, and available equipment.

Application Process

1. Test Soil: Determine current pH and amount of lime needed. NC State Extension provides soil testing
2. Calculate Amount: Follow soil test recommendations exactly. Over-liming creates problems like nutrient lock-up
3. Select Spreader: Drop spreaders provide better control than broadcast spreaders. Make two perpendicular passes for uniform coverage
4. Apply on Moist Soil: Lime penetrates better when soil is moist from recent rain. Avoid applying to waterlogged or bone-dry soil
5. Water After Application: Water thoroughly to incorporate lime and improve soil contact
6. Timing: Apply in fall (September-November) for spring pH improvement, or spring (March-April) for summer benefit

Results Timeline

Ground limestone typically requires 4-8 weeks to meaningfully raise pH. Results are visible within this timeframe as grass vigor and color improve. pH continues to adjust over months. Retest soil in 6-12 months to verify target pH achievement.