Lawn in winter may enter dormancy and face multiple stressors.

Grasses enter a dormant survival state in winter rather than dying, and common winter stresses — dehydration, snow mold, ice, mites, and road salt — often produce similar damage that becomes visible after snow and ice recede.

Winter brings prolonged cold, dry winds, fluctuating snow cover, and ice that affect what is happening beneath the surface of a lawn. Many cool- and warm-season grasses enter dormancy as soil temperatures fall to around 55 degrees Fahrenheit, slowing top growth while storing energy in roots and the crown. Dormancy does not mean the plant is dead, but crowns and roots remain vulnerable to environmental, biological, and chemical stressors. Symptoms from dehydration, snow mold, ice accumulation, salt exposure, and mite feeding often do not appear until snow and ice melt. Key observations: - Grasses enter dormancy around 55 degrees Fahrenheit and redirect energy to roots and the crown while above-ground blades may turn straw-colored. - Desiccation, sometimes called winterkill, occurs when crowns lose moisture during cold, dry, and windy conditions and frozen soil prevents water uptake by roots. - Prolonged snow cover creates favorable conditions for fungal pathogens such as gray snow mold (Typhula spp.) and pink snow mold (Microdochium nivale), which often appear as matted, circular patches when snow recedes. - Winter grain mites feed on cool-season grasses and can cause silvery or discolored blades that may be mistaken for frost or desiccation damage. - De-icing salts can accumulate along roads and driveways, drawing moisture from plants and producing browning that can persist into spring if soil salinity remains elevated. - Many winter stressors produce similar-looking symptoms, so visible thinning, matting, or discoloration alone does not identify the cause until crowns and soil can be inspected after thaw. Summary: Damage to crowns during winter can compromise spring recovery even if turf looked healthy before frost. Visual inspection of crowns and turf as snow and ice recede is a commonly used way to assess likely regrowth. When diagnosis is unclear or damage appears widespread, professional assessment is often sought.