The best time to winterize your lawn and make it resilient to the sudden freeze is between the early to the late fall season. Winterizing refers to adding a nitrogen fertilizer just before the grass stops growing and before it goes into dormancy.

What Happens to the Grass at Low Temperatures

When you get to the colder temperatures, the grass stops most of its top growth. By doing so, it does not mean that the grass is not consuming energy. The grass consumes energy; however, it expends that energy into growing deeper from the roots to accumulate more nutrients.

Therefore, if you add nitrogen to the root system when the roots are digging deep for nutrients, you are, in turn, providing them with the energy that they can store until the winter passes. This means that the grass will blossom in the spring of next year. Nonetheless, it is important to know that every grass type is different, and you may have to time the fertilizer according to the grass type and the region.

The Timing

The general rule of thumb to tell whether you should start your lawn winter prep is to observe your lawns last mow. Just as winter arrives, you begin to notice that the grass is slowing down or its growth rate is decreasing, and you may not have to mow the lawn anymore. This is an indication that the ground will freeze anytime. Therefore, this is the best time to equip your lawn’s roots with sufficient fertilizer. This is also the time when temperatures are hovering around the upper 40s consistently for weeks.


When it comes to the fertilizer for winter prep, you want to make sure that you provide the grass with one that has a decent shot of nitrogen. You also want to look for one that does release slowly. Ensure that the fertilizer is quick release instead. Moreover, if you resort to a synthetic option, water them if you expect no rain in the area.

Other Cool-Season Lawn Tips

Many people like to mow just before the winters. However, if you decide to do that, the longer you continue watering and leaving your lawn a little longer, it helps your lawn stay greener all winter.

This will often allow your lawn to stay greener when the winter spell ends for a short period. If you are cutting down your lawn just a notch because you are afraid of mold in the spring season, you should not worry, as the nitrogen that you apply late fall will help cope with it later spring. If you have any questions, make sure to contact us.