I have read some posts regarding some people that are dethatching during the spring months...now maybe I am wrong but from my education and certification dethatching during the spring months is not a good idea, it should be done around August/September. By dethatching during the springs months you remove the excessive 1/2 inch or more of thatch and thus giving weeds a better chance of germination. But by waiting until late summer/early fall weeds are starting to die off and thus dethatching lets the grass be able to take over more than the weeds. Let me know what you guys think? What is your opinion on dethatching during the spring months?