Seeding after pre-emergent

Discussion in 'Homeowner Assistance Forum' started by Bob E, Apr 3, 2006.

  1. Bob E

    Bob E LawnSite Member
    Messages: 60

    I now have a company that comes by and puts down pre-emgergent twice a year and fertilizes throught the year. I think the total is 5 or 6 times.

    Thay have already been here once this year.

    My question is that I have a couple of places I need to spread seed in. If I break up the surface soil a little bit and sow seed will the pre-emegernt stop the seed from germinating? Or does the pre-emergent create a blanket on the soil surface and by tilling the area I will sow will that allow the seed to germinate?

    I will be spreading a blend of fescues mixed with some bluegrass.
  2. Dixie Rob

    Dixie Rob LawnSite Member
    Messages: 107

    I'm no expert, but I've always been told you cannot get seed to germinate after applying pre-emergent for 90 days.
  3. KCLandscape

    KCLandscape LawnSite Senior Member
    Messages: 524

    The fescues will have a better chance because they are a bigger seed.
    Do a all fescue mix and be sure to scruff up the surface to break the barrier.
    Still have to redo/overseed it in the fall I bet
  4. hvychev77

    hvychev77 LawnSite Member
    Messages: 17

    i'd wait at least 4 mowing before even attempting it!
  5. ThreeWide

    ThreeWide LawnSite Bronze Member
    Messages: 1,116

    Depending on the amount of preemergent applied, seed germination will not occur for at least 90 days afterward, maybe longer.

    However, if you till the soil to about 4 inches depth, you will basically eliminate the preemergent barrier. Otherwise, wait until Fall.
  6. muddstopper

    muddstopper LawnSite Silver Member
    Messages: 2,341

    Break up the soil where you plan to reseed and then water heavily for several days before applying the seed. Applying a humate product will help some since it tends to attach itself to the chemicals holding them and reducing their effectiveness.

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