What Happens to Your Lawn During the Winter Months?

What Happens to Your Lawn During the Winter Months?


The effects of Ice coverage can cause varying degrees of lawn damage depending on the severity of the ice coverage, the length of exposure, and the hardiness of the turfgrass species effected.   Where snow coverage is generally considered desirable with the exception of the increased risk for snow mold disease, ice coverage on the other hand is more of a concern and is undesirable often causing more severe damage that requires renovation practices to speed up recovery.

The formation of ice coverage can take place from a number of different factors including freezing rain and rain, poorly drained soil and areas where standing water settles and freezes, and the natural melting of snow and refreezing as ice.   The critical duration of ice coverage before plant death starts to occur is usually somewhere between 30 – 120 days depending on the turfgrass species.  Creeping Bentgrass and Kentucky Bluegrass both have excellent winter hardiness making them less susceptible to winter kill related issues.   Fine fescue and perennial ryegrass have poor winter hardiness and are far more susceptible to ice damage and other winter kill causes.

Long durations of ice coverage significantly increase the chances for severe turf damage regardless of the turf species.  Plant death occurs as a result of ice coverage by the following reasons.  Carbon dioxide gas builds up and becomes toxic when it is trapped under the ice, crown hydration takes place when freezing and thawing occurs and plant cells rupture resulting in death, and the plants hardiness is weakened and reduces its susceptibility to resist damage.

The extent of the turf damage is first visible when the snow and ice melt away, and in many cases this damage may be isolated to only certain areas of the lawn specifically in the lower lying spots and also in the shaded areas where the ice coverage persisted the longest.  If complete death has occurred, an aggressive combination of renovation practices such as slitseeding, topdressing, and core aeration will help repair these areas.  If the damage is sparse and only appears minor, the lawn can usually recover on its own or a light seeding can help speed the recovery up.

What Happens To Your Lawn During The Winter Months?

What Happens To Your Lawn During The Winter Months?

What Happens to Your Lawn During the Winter Months?


Have you ever thought about what happens to your lawn over the winter months when it is covered under ice and snow?  Or wonder why the lawn looks so bad in the spring after the snow melts when it looked so good in the fall?  Or Better yet, all the work you will need to do this spring to quickly get the lawn looking its best again?

To help answer these questions, it is important to outline what can and commonly does happen to your lawn during the winter.  Secondly, determining the what, where, why, when, and how things take place and the damaging effects they can have on your lawn is equally as important.   Understanding this can provide helpful insight on what can be done to help prevent these things from happening next winter, and help determine what course of action might be required to fix your damaged lawn.

Measuring Snow Coverage

Measuring Snow Coverage

Winter Kill is a common term used to describe turf damage that takes place during the winter.  A number of factors and a variety of conditions can contribute to winter kill resulting in moderate to severe turf damage depending on the circumstances.  Most people assume winter kill only happens if and when snow is covering the lawn.  This is not true.  Lawns covered with snow for months at a time certainly do see their fair share of turf damage, but snow alone is not the only factor that causes damage.

Highlighted over the next several blog posts, I will outline some of the most common types of winter damage and the steps to help your lawn recover if and when they do happen.  These include the following:

Snow Coverage

Ice Damage

Crown Hydration


Low Temperature Kill

Snow Mold Disease

Salt Damage

Vole Damage