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Why is my Lawn Brown After I Mow?

May 24th, 2021

A common issue in Bermuda and Zoysia lawns during the summer growing months is what we call mower stress.  The stress occurs when too much top growth is removed in a single mowing. Sometimes, this may not appear until a few days after the lawn is mowed. During the summer growing season, the turf is rapidly growing from fertilization and warm temperatures, which produces more top growth. When too much of this new growth is removed at once by mowing, this removal can cause some stress in the lawn.  In the picture below, you can see the straight lines of discoloration. Seldom in nature, whether it is a disease or insects will you see straight-line damage.  

To avoid mower stress, we recommend mowing the lawn more often. Weekly mowing encourages lateral growth and over time can lead to a thicker, healthier lawn. Your yard may benefit from raising the mowing height.  Adjusting the height is generally a last resort measure and you still want to stay within your range of recommended mowing heights. Bermuda and Zoysia lawns should be maintained at a height of 1-2 inches. Also, be sure to sharpen your mower blades every year. The turf should recover with a few maintenance modifications to your lawn.  

Checklist to avoid mower stress and prevent a brown lawn.  

– Mow every 5-7 days during the growing season. 

– Sharpen your mower blades. 

– Raise mower height. 

Download our Mowing Guide for more information!

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