“How Old Is Too Old”

Discussion in 'Pesticide & Herbicide Application' started by Grass Man, Apr 8, 2005.

  1. Grass Man

    Grass Man LawnSite Senior Member
    Messages: 272

    “How Old Is Too Old”

    .... Yesterday I put down 100,000 sq. ft. of Scott's Turf Builder with Plus 2 Weed Control. Last night it drizzled or a light rain all night which was ideal. My question is this. The fertilizer is 2 or 3 years old and I am wondering just how effective it will be?

    .... Does anyone have any experience or insight in to this :help: ?
  2. marko

    marko LawnSite Senior Member
    Messages: 963

    A lot would depend on the storage conditions (humidity/wetness, temp. swings etc)
  3. Grassmechanic

    Grassmechanic LawnSite Silver Member
    Messages: 2,697

    If your +2 w/weed control was rained on, chances are your weed control is going to be ineffective. 2 or 3 year old fertilizer will still be effective, but the pesticide may experience some degradation over that amount of time.
  4. cemars

    cemars LawnSite Senior Member
    Messages: 387

    Grass man said it drizzled, not rained. Regardless, unless it was a heavy rain it should work fine. If the product spread with out problem it is OK. If it has clumped up , then it has absorbed to much moisture and results may be compromised. When I sold fert, we often had 2-3 year old product that worked fine, moisture however can cause problems in a few weeks if not stored properly.
  5. Grassmechanic

    Grassmechanic LawnSite Silver Member
    Messages: 2,697

    Cemars please re-read it. He said "drizzle or light rain". Regardless, any precipitation on a broadleaf weed application (Scott's +2) is less than ideal. Now, if he was applying Scott's with Halts for crabgrass control, then he'd be OK.
  6. slow release

    slow release LawnSite Member
    Messages: 93

    Probably should have tested it out on a smaller area to be safe! IMO :dizzy:

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