- There is no set date to stop mowing your lawn. Cool-season grass types will grow into the fall season as temperatures dip. Typically, cool season grass varieties go dormant between October to mid-November, but that is subject to change, depending on where you live. Meanwhile, warm season grass stops growing when temperatures dip in early fall. Mow one last time while your grass is still green. Your grass' preferred height also influences when you should mow.
- All grass types should be maintained at a specific height. For example, keep cool-season grass such as Kentucky bluegrass at 2 to 2 1/2 inches. Maintain warm-season grass like bermuda at 3/4 to 1 1/2 inches. Never remove more than 1/3 of the grass blade at one time. Mow the grass when it grows 1/3 of the way higher than its recommended height.
- Do not mow your lawn when it is wet. Wet grass clippings clump up and prevent air and sunlight from reaching grass blades. Also, mowing the lawn when it is wet may encourage fungal diseases. Mow your their lawn a few days after applying any post-emergent herbicide. Mowing right before you apply the herbicide can decrease its effectiveness.
- Make sure that your mower has sharp blades before mowing the last time of the season. Blades quickly dull throughout the year. Mowing with dull blades wounds the grass and creates an entryway for fungal diseases. Leave the grass clippings on the lawn. Grass clippings contribute nitrogen, which helps grass roots continue to grow when the blades have stopped for the season. Evenly distribute the grass blades over the yard, so that they do not clump up.
Timing
Mowing Height
Other Factors
Mowing
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