Richard Thoms said:

Quote: JL wrote on Thu, 16 August 2007 23:28
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I had a section of lawn that had crabgrass in years past.
This spring I used a product that contains Dimension (thanks ahlg).
It worked great. I have some stray crabgrass plants
that I deal with spot treatment.

Will I ruin my Dimension for next year if I de-thatch
this fall/next spring? That is, how long do I have to
wait for the crabgrass seeds to finally die before I'm
able to dethatch?
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I'm just curious. Why would de-thatching interfere with the pre-emergent?

The pre-emergent creates an invisible "barrier" that the weeds can't poke
through. Any distruption of that barrier renders it useless.

--

Eggs

Two can live as cheaply as one, for half as long.