What's Happening?

During winter, lawns across the United States face a variety of environmental and biological stressors. Cool-season grasses like Kentucky bluegrass and tall fescue, as well as warm-season grasses such as zoysia and Bermuda, enter a dormancy phase when soil temperatures drop to around 55Â°F (13Â°C). This dormancy is a survival mechanism that allows the grass to remain alive and metabolically active at a low level, relying on stored energy and soil insulation. Common winter threats include dehydration, fungal diseases like snow mold, ice accumulation, and road salt exposure. These stressors can cause damage that often becomes visible only when snow begins to melt. According to TruGreen, understanding these threats and taking appropriate action can help ensure a healthy lawn in spring.

Why It's Important?

Winter conditions pose several risks to lawns, including desiccation, snow mold, mite activity, and salt injury. Desiccation occurs when grass crowns lose moisture due to cold, dry, and windy conditions, especially when snow cover is absent. Snow mold thrives under prolonged snow cover, affecting cool-season grasses. Winter grain mites feed on grass, causing damage that can be mistaken for frost damage. Road salt can lead to browning along driveways and roadsides. These issues can compromise lawn health and recovery in spring, making early identification and treatment crucial.

What's Next?

As winter progresses, lawns remain dormant until soil temperatures rise above 55Â°F (13Â°C). During this time, grass blades may turn straw-colored, but the roots and crown remain alive. Snow mold and other damage become apparent as snow melts. Homeowners should inspect their lawns for signs of damage in late winter and early spring. Early identification of issues like snow mold can prevent further spread and aid recovery. TruGreen advises monitoring crown conditions, as firm and white crowns indicate potential regrowth once temperatures increase.

Beyond the Headlines

Homeowners should inspect their lawns for snow mold and other damage as snow begins to melt. Light raking can improve air circulation and reduce moisture. Lowering the mower blade for the first cut in spring can encourage new growth. Applying spring fertilizer can aid lawn recovery. Consulting a lawn care professional may be beneficial if damage is widespread or difficult to diagnose.

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