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high n for winter?

Discussion in 'Pesticide & Herbicide Application' started by bobbygedd, Mar 3, 2003.

  1. bobbygedd

    bobbygedd LawnSite Fanatic
    from NJ
    Messages: 10,178

    just got some info from a supplyer. they recommend a november application of 30-3-5. what do u guys think of a high n winter app?
  2. morturf

    morturf LawnSite Senior Member
    from midwest
    Messages: 476

    Sounds like a good way to get some fungus troubles. Most of the services I have seen do that and then have a winter with extended snow cover end up with lots of snow mold. My only thought on this
  3. Russ

    Russ LawnSite Senior Member
    Messages: 540

    I don't know anything, but I do know Purdue is right about this;



    Turf 101: Why does a November application of fertilizer work?

    Nitrogen stimulates increased photosynthesis and the extra energy derived from this goes directly into growth, respiration to maintain the plant (similar to humans), or into storage. In early November, the temperature is still adequate for photosynthesis, but cool enough to minimize respiration demands and too cold for significant growth. Therefore, most of the extra energy derived from a November application of nitrogen is stored by the plant. Next spring, these storage products are used in green-up of the plant and more importantly, for root growth. According to some of our earlier research, it is important for the plant to take up the nitrogen quickly in the fall and store the energy for maximum root growth next spring with a minimum of shoot growth. Though one might think that nitrogen applied early next spring would do the equivalent as November-applied nitrogen, just the opposite occurs and shoot growth is stimulated dramatically with early spring-applied nitrogen. A spring application of nitrogen will never compensate for a missed application in November.

    Zac Reicher, Assistant Professor/Turfgrass Extension Specialist
  4. Greenie

    Greenie LawnSite Member
    Messages: 105

    I tried it on two large lawns during the late fall of 2001 and was pleased with the results the following spring. No signs of disease or molds.
  5. lawnstudent

    lawnstudent LawnSite Senior Member
    Messages: 472

    snow mold is usually the result of grass left too long and significant snow cover that keeps the grass wet in spring. A late fall N application will not promote snow mold if it is applied when temps are cold enough to prevent a flush of top growth but the soil is still warm enough to support root development. For this app to work you must apply a fast N source that is not affected by the cold temps. It is also recommended that this app be reduced to 0.5 - 0.75 lb. N per 1,000 sq. ft. as leaching is more prevalent at this time of year.

  6. Good work russ

    How many lbs. of n per 1000? What % slow release? What source of slow release? What plant hardy, and heat index zones are you in? Assume cool season turf. When do you normally stop mowing? You will get better advice if you supply us with adequate info.
    Late season fert is generally a very good concept if timing is correct and proper amount of n is supplied, taking into account the source of n.
  7. 1grnlwn

    1grnlwn LawnSite Bronze Member
    Messages: 1,261

    We use 46-0-0 .75 lbs/1000.

  8. to 1grnlwn,

    From N ILL and spent 5 yrs in Danville Ill.
    Wondering when you make .75 lbs of N application. 11/15, 12/15, 01/15, or when??
  9. 1grnlwn

    1grnlwn LawnSite Bronze Member
    Messages: 1,261

    Mid november.

  10. CCLAWN

    CCLAWN LawnSite Member
    Messages: 55

    Near St. Louis we go between .75 and 1.25 lb N from Nov 1 to Dec 15. In spring you can minimize the Nitrogen with a combo product and go with higher K. Granted this is the transition zone too. What works here will not work everywhere. We have had success with this and then coming in Late Spring go with .5 lb n with at least 50% slow release.:cool:

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