Wisconsin experts urge proper mowing and fertilizer practices for healthier lawns

University of Wisconsin–Madison turfgrass specialist Doug Soldat advises homeowners to sharpen mower blades and cut no more than one‑third of the grass blade at each mow, recommending higher cutting heights to promote deeper roots and weed suppression.

He warns that excessive fertilization, especially phosphorus, can increase runoff that fuels algae in nearby lakes. Most lawns already contain adequate phosphorus, so applications should be based on soil‑test results. Proper nitrogen use builds thicker turf, reducing erosion and water flow down slopes.

Soldat also suggests early‑season crabgrass prevention and cautions against aggressive treatment of weeds like dandelions and clover, noting that clover can naturally add nitrogen to the soil. During heat and drought, he recommends limiting mowing and fertilizing to avoid further lawn stress.