Fertilizer for new lawn

Discussion in 'Fertilizer Application' started by GASPowered, Sep 12, 2012.

  1. GASPowered

    GASPowered LawnSite Member
    Posts: 7

    I have a 10,500 sq ft yard of new Kentucky Bluegrass sod. It was put in in late July so I’m ready to do the first application of fertilizer. I waited this long because I did not want to proceed without getting a soil report first. I have that now and it reports that, per year / per 100 sq ft, I need 4 lbs of nitrogen (high maintenance schedule because of sprinkler system), 1.2 lbs of phosphate and 1.3 lbs of potassium. So I’m thinking I need to find something with a 4-1-1 ratio. Is there a brand or source you could steer me towards? If my math is correct, I’ll need to lay down about 42 pounds of N, and 12-13 pounds each of P and K per year for my lawn. What is the best schedule for doing this?
     
  2. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,080

    There is no indication of where you live so it is hard to say when your winterizer would go down... here I'm ready for a second app of fert for mid Sept. and will have the winterizer down before mid-Oct...

    I want the fert to be used up before the ground freezes so I apply it as water-soluable rather than slow-release... unused fertilizer pellets tend to get washed away at snow melt and even worse may end up in the water table...

    4lbs/k is standard fair for lab reports on N... you could apply .5 or .75 lbs/k now,,, then again as winterizer...

    P ,,, I would apply once and be done with adding that altogether... in fact I'm surprised that a lab report for turf would recommend P at all... they must think you're growing corn...

    K ,,, you can add with the winterizer as is customary in most winterizing ferts...
     
  3. GASPowered

    GASPowered LawnSite Member
    Posts: 7

    Thanks. I'm in SE Michigan.

    Good to know about the slow release.

    I'm not sure why they recommend P. It's new construction with rocky clay soil underneath the nice stuff that came with the sod.
     
  4. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,080

    Hopefully you have roots growing into that clay underneath the sod layer... sounds like a load of compost would be in order moreso than a particular fertilizer... aerating it first so that the compost gets down into the desired root zone a bit... :)
     
  5. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 12,111

    I am sure they recommended 4 pounds of nitrogen for 1000 sqft per year, (not 4 lbs per 100 sqft).
    Axe is right--you don't need the phosphorus--and its not legal in Michigan--unless the soil test shows a deficiency, (below about 20 pounds per acre).

    I think Scotts has a 26-0-8 or something similar--it would be fine. Follow the directions on the bag. You will get about one pound of nitrogen per 1000 sqft. Do the same about every 6 weeks next year, and it will total about 4 pounds of nitrogen per 1000 sqft per year.
     

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