Lime Under Maple Trees: Minnesota Perspective

Maple Leaves & Soil pH

Maple leaf decomposition gradually acidifies soil. In Minnesota's often alkaline glacial soils, this may actually be beneficial. In naturally acidic soils, it worsens the problem.

Don't Guess—Test

• Free/low-cost via U of MN Extension.
• Sample 6–8 inches deep, 10+ cores mixed.
• Test every 2–3 years.

Lime Only If Test Says So

If pH < 6.0: apply recommended rate (usually 25–50 lbs/1,000 sq ft). Fall application ideal. Pelletized lime easier to spread.

Father's Practice

If dad had great lawn, his lime routine matched his soil. But soils vary even neighborhood-to-neighborhood. Test yours.