Plant Problem Diagnostic
Ground-Nesting Bees in the Lawn
The short answer
Those small volcano-shaped dirt mounds that appear in thin, dry patches of lawn in spring are the nests of solitary ground-nesting bees, and NC State Extension puts it plainly: they are not a threat to people, plants, or yards. Each female digs her own quarter-inch burrow, rarely stings, and there is no colony to defend, so there is no mass attack the way there is with yellowjackets. The activity lasts only a few weeks, and the mounds do not damage the lawn.
The best response is to do nothing and let these important native pollinators finish nesting. If the bare patches bother you, make the spot less attractive for next year: overseed to thicken the turf and keep the area watered during their spring flight season, since these bees prefer dry, sparse ground. Never dump insecticide down the holes of an insect you have not identified.
Bee or yellowjacket? Check the hole
This distinction matters because one insect is docile and the other defends its nest aggressively. Ground-nesting bee sites show many separate small openings, each about a quarter inch across, one per female, often dozens scattered across the same sunny patch. A ground-nesting yellowjacket colony is the opposite: hundreds of wasps sharing one entrance hole, usually more than an inch across, with constant fast traffic in and out. If you see a single busy hole rather than many quiet little mounds, treat it as a yellowjacket nest, keep your distance, and read our wasps guide before doing anything else.
Why Extension says to leave them
- They are important, essential pollinators of spring crops, fruit trees, and wildflowers, active exactly when early blooms need them.
- Solitary bee females rarely sting; they do not defend their nesting area the way social wasps and honey bees do.
- The mounds are temporary and do not harm turf; nesting activity typically wraps up within a few weeks.
- Their tunnels help aerate the soil, improving water and nutrient movement.
If you would rather they nested elsewhere
Ground-nesting bees choose dry, sparsely vegetated, well-drained spots. The long-term, bee-safe fix is cultural: overseed thin areas so the turf fills in, mulch bare garden soil, and run a sprinkler on the area during the spring nesting window, since damp soil is far less attractive for burrowing. Insecticides are unnecessary and kill pollinators the rest of your garden depends on. If you want to support these bees deliberately instead, our pollinator garden guide covers leaving small patches of open, undisturbed ground on purpose.
Sources
Reviewed 2026-07-18. We cite university Extension, government, and established horticultural sources — and never invent pesticide rates or dangerous treatments.
- NC State Extension - Ground Nesting Bees Not a Threat — Ground-nesting bees are important, essential pollinators; their small mounds do not damage lawns and they are not a threat to people, plants, or yards.
- Ask Extension - Ground Bees, Yellow Jackets, or Other — Solitary ground bees each dig an individual nest with a roughly quarter-inch opening and rarely sting; ground-nesting yellowjackets are social, share a single entrance usually over an inch across, and defend the nest.