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Too Late to Dethatch Lawn?

Posted by TNG1 none (My Page) on
Tue, Oct 15, 13 at 8:10

Hey Everyone,

I've read a few things about dethatching lawns and some say it's too late, but others say anytime is a good time. I live in Central Ohio and my lawn is Kentucky Bluegrass. Is it too late in the growing season to dethatch it? If so, how early in the Spring should I do it next year. Thanks in advance for your help! Much obliged.


Follow-Up Postings:

RE: Too Late to Dethatch Lawn?

Why do you want to dethatch it? Was it suggested by someone or is it something you know something about?

Normally you should not need to dethatch unless you are watering too frequently (for example daily instead of once per week during the summer) and if you are feeding with a liquid fertilizer at least once per month. This time of year you should have moved your watering to once per month. Normally the microbes in the soil will decompose the dead grass as it filters down after mowing.

This time of year I would spray it with molasses to stimulate the soil bacteria and let it sit for the winter. Then in the spring, look to see if the thatch issue is any better. The molasses rate is 3 ounces per 1,000 square feet. Do you use organic fertilizer at all?

RE: Too Late to Dethatch Lawn?

If you have a thick thatch layer (1/2 inch or more) then by all means dethatch it now. Save the molasses for your baking. At the rate Dchall suggested all you will have is sweeter soil (see USGA study below).

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