Reseeding After Grub Damage with Well Water Safety

Grub-damaged lawns in Pennsylvania can be renovated in spring with careful insecticide selection to protect well water.

Grub Control

• Apply imidacloprid (Merit) in late April–early May for season-long control.
• Low mammalian toxicity; minimal leaching risk in clay soils.
• Confirm product registration with local nursery.

Reseeding

• Seed as soon as soil reaches 55°F (typically April).
• Use tall fescue or Kentucky bluegrass blends.
• Starter fertilizer at seeding; regular program thereafter.

Imidacloprid's safety profile makes it suitable for well-water areas when used per label.