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Red Thread

What is Red Thread?

Red Thread is a parasitic form of plant life called fungi that live in the soil, thatch and dead leaves year-round. These fungi feed off the grass by drawing valuable nutrients from it.

How does Red Thread spread?

Read Thread spreads throughout the lawn in the form of spores, which are spread by wind, air, water, and humans. Other factors that may encourage the spread of the disease are poor air circulation, poor drainage and a thatch layer greater than ¼” (1cm).

What causes Red Thread?

Red thread may be caused by improper mowing and by watering during hot, humid weather. Discuss maintenance practices with your Weed Man.

What types of grass are most susceptible to Red Thread?

Red Thread attacks most types of grass but is generally found on lawns that contain high proportions of the Fescue & Ryegrass species. Under ideal conditions, the fungi appear as small red filaments (“threads”) that may be seen projecting out of the affected leaves.

Controlling Red Thread

Controlling Red Thread can sometimes be achieved by changing watering habits, mowing practices, modifying the fertilizer program, providing more air circulation, aeration, and in extreme conditions, applying a fungicide to the lawn. Regular applications of a balanced fertilizer will produce a healthy lawn, which is more resistant to attacks by this disease. Have your Weed Man fertilize your lawn and advise you on correct maintenance to ensure a healthy disease free lawn.

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Main Service Areas

DeVries services the greater Grand Rapids area with the finest commercial and residential outdoor care. Service areas vary. 

Contact us at 616-669-0500 for more information.

Each and every one of your staff that I came into contact with has been courteous, professional and gracious! They have been happy to answer any questions and have gone above and beyond! We thanked the ones working by our condo yesterday with cookies and waters! What a great group of young people! Way to go DeVries!!


Hudsonville I Aug. '19

Turf Tip

Dog Spot

Animals, especially female dogs, can cause considerable damage by urinating on a lawn. Learn more about how to identify Dog Spot and how to keep it under control.