Once frost becomes a regular occurrence on your lawn, the growing process slows or stops completely because the grass is getting less nutrients. There are some tips that will be helpful for your lawn care during this transitional time. First, as long as the lawn is green, it is still growing and alive.Click to see full answer. Also to know is, does grass grow after a freeze?Although grass does not stop growing in winter, it grows so slowly when temperatures go below 40 degrees Fahrenheit that mowing your lawn between November and March isn’t necessary (scroll down to see the step you must follow if you need to mow your lawn during winter).Likewise, will Frost kill freshly cut grass? Mowing when grass is frozen, or still has residual frost on it, can injure the plant. Another potential problem, is if you mowed your lawn right before that frost. Mowing creates a wound to the plant, and that wound would then be more susceptible to frost damage. Also asked, will grass seed grow after first frost? The easy answer is that frost will not kill grass seed, but that does not mean that you should plant grass seeds when there is danger of frost. While the seeds will survive until the next growing season, any seeds that sprout into seedlings will not.Is it better to leave grass long or short for winter? Leave the lawn cut at the right height Raise the mowing height slightly in the fall. However, if the grass is too long going into the winter, it will become matted, which encourages winter diseases such as pink and grey snow mould.