Controlling Yellow Nutsedge in a Philadelphia Lawn with Clay Soil

A homeowner near Philadelphia has great spring/fall lawn but loses summer battle to yellow nutsedge despite aeration, Scotts 4-step, and frequent mowing. Soil is heavy clay.

Why Nutsedge Is Tough

Perennial; pulling leaves nutlets (rhizomes) that regrow. Thrives in wet, compacted clay.

Cultural Practices to Discourage It

• Mow high (2.5–3 inches) and frequently (⅓ rule) to shade soil.
• Dense turf prevents nutsedge establishment.
• Thanksgiving winterizer fertilizer for strong spring roots.

Herbicide Resources

• Illinois Turf Weed Control (see left column)
• OSU Nutsedge Fact Sheet

No quick fix; persistent cultural management plus targeted herbicides (per labels) is the strategy.