When to Stop Cutting the Grass in the Fall?

Temperature

• The best time to stop cutting your grass is when the temperature falls below 50 degrees Fahrenheit (10 degrees Celsius) for at least one week. As the temperature fluctuates around 50 degrees, run your lawn mower over your grass so that it measures up to 30 percent lower that your usual cut. This ensures that when the temperature continues to drop, your grass will not be tall enough to tangle and grow mold during the winter months.

Grass Growth

• Use the one-third rule when cutting your grass for the last time before winter. For example, if you usually let your grass grow to 4-1/2 inches, cut it down to 3 inches. The grass could die during the winter if cut too short, while leaving the grass too long will cause it to tangle. As winter approaches, the growth cycle of the grass also will begin to slow.

Soil Conditions

• Consider the condition of the soil when deciding when to stop mowing in the fall. If the soil is relatively dry, continue mowing until the temperature falls below 50 degrees for at least one week. If the soil is soggy, avoid mowing because the clippings will retain water and create the perfect environment for mold growth. If you do decide to mow, collect the grass clippings; otherwise, store your mower in late autumn. Typically, soil tends to become soggier in November, but the soil's condition ultimately depends on the climate of your area.

Storing Your Mower

• To maintain the quality of your lawn mower, prep it for the winter. Adorn gloves, and empty the gas tank to prevent leftover fuel from clogging parts. Put the gas into a gas can, and store it away from anything flammable. Run the mower until the rest of the gas is consumed. Remove grass and dirt from the underside of the mower; you can use water from a hose if necessary. Dry the mower completely, and spray a lubricant, such as WD-40, to protect the mower from moisture and other elements. Store the mower in a dry place.