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v. de·thatched, de·thatch·ing, de·thatch·es
To remove (dead grass) from a lawn, usually to aerate the soil.
To remove dead grass from a lawn.

de·thatch′er n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


vb (tr)
to remove dead grass from (a lawn)
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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References in periodicals archive ?
The Power Lawn Rake's proprietary features allow it to rake and dethatch a lawn with equal efficacy.
Choate plans to aerate and dethatch at the same time, renting the aerator in the morning and the dethatcher in the afternoon.
They can also help cover seed beds, spread fertilizer, dethatch pastures and lawns (root raking) and a host of other chores.
A: Dethatch after thatch on the ground has built up past 1/2 inch.
Power-rake or dethatch the lawn in early spring before new growth has begun.
If you walk on your lawn and it feels spongy, it is probably time to dethatch. Thatch is a layer of dead roots and stems (not clippings).
Warn customers not to rake or dethatch lawns after applying pre-emergent herbicides.
To protect dormant lawns in areas where watering is banned, limit foot traffic and do not fertilize, dethatch, or aerate the grass.
* To find out how to dethatch and aerate for greener, healthier grass, search for "lawn