Fertilizing in Hot Temps

Discussion in 'Pesticide & Herbicide Application' started by jondcoleman, Aug 1, 2008.

  1. jondcoleman

    jondcoleman LawnSite Member
    Messages: 181

    I am wondering if some of you could give me some of your general guidelines for applying granular fertilizers in hot temperatures. For example I have a lesco 24-0-11 50% slow release that I want to put down next week but the temps are going to be in the low 90's. Any wisdom will be appreciated! Thanks a lot!
  2. redbuckcavs

    redbuckcavs LawnSite Member
    from indiana
    Messages: 135

    If the lawn is "actively" growing you shouldn't have any problem (If the lawn is already dormant due to lack of moistue I would wait)

    The key to the fert is the % of slow release and 50% slow release is great----we use the same fert and have great results in Aug.
  3. ICT Bill

    ICT Bill LawnSite Platinum Member
    Messages: 4,115

    Caution - We are in Columbia MD, I have heard triple digits next week. It will be site specific, if there is irrigation no issues, but you might want put a "please water in" note on the other sites.

    If they don't you lose a customer or 2, you may want to think about reducing the rates, with the soil well over 70 degrees the NPK will be available pretty darn quick
  4. bj22

    bj22 LawnSite Member
    from ny
    Messages: 69

    using same product in the heat but down to half lb per 1000sf good results and bag goes a long way $$$$$$$$
  5. greenman099

    greenman099 LawnSite Member
    Messages: 27

    What results do you see? This is less than 1/8 lb. of N per 1000. (Maybe cool season grasses are different.)
  6. ICT Bill

    ICT Bill LawnSite Platinum Member
    Messages: 4,115

    I should have asked this question earlier, what type of grass typically?probably bermuda and St Augustine, both have different needs

    When soils are warm like now the microbes are very active, when you apply a little NPK they gobble it up and make it plant available very quickly, so you can use less and still see good to great results, but the application does not last as long either
  7. heritage

    heritage LawnSite Bronze Member
    Messages: 1,351

    Salt Index that are higher in some ferts as well as Chloride as in Potassium Chloride can really cause a burn-up issue quick!

    See if you can get that 24-0-11 50% PPSCU with Potassium Sulfate, in place of the Potassium Chloride, If you MUST apply in HOT Temps.

    OR have clients apply 1/2" of irrigation AS SOON as you are done blowing off the Sidewalk/Driveway, to lower/dilute, the salt concentration of the applied fert.

  8. LushGreenLawn

    LushGreenLawn LawnSite Silver Member
    Messages: 2,120

    I think he meant 1/2 lb nitrogen per K.

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