when do grebes hatch
In summer, beetles burrow into the lawn and lay eggs that will hatch into grubs. In late summer and early fall, newly hatched grubs feed heavily on your grass roots before hibernating for winter. It is during this time that young grubs do the most lawn damage as they gorge themselves prior to hibernation.hereâs no way to tell when they invade your lawn, because they do their dirty work underground where you canât see them. Your lawn can look fine on top, while grubs are eating away at the roots, cutting off the supply of water and nutrients to your grass plants.