Seeding B4 Pre-M

Discussion in 'Organic Lawn Care' started by Smallaxe, May 11, 2008.

  1. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,082

    I now have my springtime overseeding growing beyond the point of being effected by synthetic Pre-M.
    If I put down cgm now - How long will it take for the active ingredient to prevent crabgrass?
     

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