Grub Control 101: Signs Your Warren County Lawn Needs It

If you've ever pulled back a patch of dead grass like it was a loose carpet, you may already know the signs of a grub problem. Grubs — the larvae of Japanese beetles and June bugs — feed on grass roots just below the surface, and Warren County's mix of clay soil and mature turf makes for a pretty comfortable home for them.

The clearest sign is irregular brown patches that pull up easily, with little to no root structure holding the soil together. A secondary sign, and often the more frustrating one, is animal damage: skunks, raccoons, and moles dig up lawns hunting for grubs to eat, which can do more visible damage than the grubs themselves.

Late summer through early fall is when grub damage typically shows up in Ohio, since that's when the current season's larvae are actively feeding before overwintering deeper in the soil. Waiting until you see damage is the least effective time to treat, though — preventive grub control applied in early-to-mid summer, before eggs hatch, is far more effective than trying to knock back an active infestation in September.

If your lawn has had grub damage in past years, it's worth treating preventively every season rather than waiting for symptoms, since the beetles that lay the eggs tend to return to the same yards. A simple way to check before committing to treatment: cut a one-foot square of turf on three sides, fold it back, and count the grubs. More than 5–8 per square foot is generally considered treatment-worthy in Ohio lawns.

Poff's includes grub monitoring as part of our seasonal lawn care programs for Lebanon, Springboro, Mason, and the rest of Warren County — reach out if you're seeing early signs or want a preventive treatment scheduled before beetle season.