Eliminating Slimy Algae and Moss in Lawns: Drainage, Shade, and pH Corrections

Causes

• Evening watering → prolonged surface moisture → algae/slime.
• Excessive shade → poor air circulation, slow drying.
• Low soil pH (acidic) → favors moss/algae over grass.

Solutions

1. Water early morning only; off by noon.
2. Remove lower tree branches to increase light/air flow.
3. Apply pelletized lime: 40–50 lbs/1,000 sq ft, now and again in fall (mid–late Sept).
4. Core aerate affected areas now and in fall.
5. Consult local garden center for region-specific products.

Why It Works

Dry surface, good airflow, and neutral pH favor grass over primitive plants.