Originally Posted by tree_hugger
You must be referring to dethatching just cool season grass. It works wonders on Bermuda and zoysia grass but we only do it in the spring and summer. The thatch insulates the roots of the warm season grass which prevents winter kill so dethatching in the fall is a no no.
Yes I am talking only about cool-season grasses...
Interesting note about thatch being an insulator for winter... We like to leave dead grass in the turf to insulate from the sun...