The Effect of Frost to Lawns
The first frosts of the season have begun. What does this mean for your grass? Luckily, grass can stand up against frost. Frost almost always thaws and evaporates later in the same morning that it forms. Frost upon blades of grass is harmless, but keep in mind frost is comprised of ice crystals and can be razor sharp under certain circumstances so you must take precaution in order to not damage your lawn. If you walk across or drive across a frost covered lawn, those ice crystals will penetrate the cell walls next to them and cause damage. This will kill those cells turning them brown.
Myths Regarding Frost
After the first frost, fertilizer should not be laid. This is FALSE. Although not much growth occurs after the first frost, there is still a lot going on in the soil. As autumn progresses, turf grasses switch the emphasis on growth from leaves to roots. The roots that are formed right now contain the fuel that will be used to power the lawn through next summer’s heat and humidity. Anything that you can do now to optimize root development now will pay off next season. Lawns will continue to grow right up until the ground freezes so continuing to fertilize is the right thing to do. An easy way to remember is: if it’s green, it’s growing; if it’s brown, it’s sleeping.