Do lawn companies de-thatch dead grass & reseed and are they expensive?
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I used to work for Tru-Green ChemLawn over 10 years ago and I used to sometimes re-seed lawns using a slit-seeder. The cost depends on the size of the area you want to do and the type of seed you want to re-seed with.
We didn't really run a de-thatcher across the lawns, as we mostly offered annual plug-type aerating but you can always rent one from your local rental store, as well as a slit-seeder and do your lawn in a day if you are stuck on your course of action.
If you are 100% positive that the problem is thatch, and not what most people simply mistake as thatch, I would rent the de-thatcher. But you can ALWAYS take a sample plug (one that shows the layers - like a core sample) to your local extension county office and have them look at it, or to your local garden center/nursery (not your box store with garden centers like WalMart or Lowe's) and talk to their resident expert just to verify before spending the money.
It may only take aerating and broadcast seeding and careful fertilizing instead of the extra cost of de-thatching and reseeding from scratch.
Here are two links to help:
http://www.urbanext.uiuc.edu/lawnchallen...
http://www.extension.umn.edu/distributio...
Some do . Have to ask . Expensive? More than doing it yourself, but less than plumbers & mechanics . ( $20-$25/ man-hr) Don't have it dethatched (Ugh!Probably started by the same #*&^&s that came up with lawn rollers) Ask for core aeration . Better for the lawn . Fairly simple to do it yourself , if you can handle the machine. Reseeding only requires a steel rake .
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