Soil test complete Very high K and P

Discussion in 'Fertilizer Application' started by CK82, Aug 30, 2012.

  1. CK82

    CK82 LawnSite Member
    Messages: 236

    I'm looking for recommendations on what should be done to a customers lawn in order to have good reseeding results. Any recommendations? His lawn is absolutely toast (dead), all of his neighbors did not water through the extreme drought, and there lawns came back nearly complete. All surrounding lawns had full sun for the better part of the day. My customers front and side yard is no more. I'm afraid to reseed and have things burn up again.

    The soil tested out at: pH: 6.9
    P: 83
    K: 105
    Organic Matter: 3.7%
  2. Smallaxe

    Smallaxe LawnSite Fanatic
    Messages: 10,082

    The first question would be 'Why, his lawn and not everyone else's???" I don't believe their P and K has much to do with it and SOM is really quite good... Does he mow during the heat? Does he apply herbicides during the heat of Summer? Was it Fescue? Full sun should be KBG and should be given a chance to go dormant with dignity when the excessive heat comes on... I've read that Fescues do not go dormant, but actually die... however it takes a lot more to kill a good stand of fescue... Is he on sand???
  3. CK82

    CK82 LawnSite Member
    Messages: 236

    Small axe, He put his weed control and fertilization company on hold since last late last Fall. His soil seemed to be decent soil with even a little dark matter possibly. I'm not certain if he mowed during the peak of the drought, its possible i guess if the lawn was looking bad. I know he did not water at all though. I believe the lawn is Kentucky blue and fescue, maybe more fescue than blue though.

    We end up aerating, power raking, overseeded, and apply a light fertilizer. Some of the areas came up in almost like a thick, dead, sod mat. I'm hoping that we dont have areas that the power raking didn't break up the matting and we will have bad seed to soil contact. Is it bad to seed with high P and K? He's watering the newly seeded areas daily, no germination quite yet.

    What would you recommend doing at this point as far as any further renovation. Should we lightly topdress to cover the seed and give it a for sure small amount of seed to soil contact? Or just water the heck out of things for a bit and see what comes through?

    Thanks much,
  4. Smallaxe

    Smallaxe LawnSite Fanatic
    Messages: 10,082

    It sounds like that you've done enough to it that, even if, there was living thatch,,, it should be roughed up enough to allow grass to grow just fine... this 95 degrees with dessicating winds wasn't really what I anticipated when I sowed seed 10 days ago, but we have germination, thanks to irrigation and shade... you probably could have given it more time to come back on its own, but with plenty of water for a week or so you should be fine with your new seed... back into the 70s next week for high temps, which will definately be good news for my next seeding project... :)
  5. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,800

    Was original lawn fine fescue? Not good in heat. Was there a high percentage of perennial rye...not good above 90.
    However, when you reseed you are forced to use a percentage of perennial rye, as it has good seedling vigor. Kentucky bluegrass will seldom give a good "take" it just comes in too slow. In any event use top-quality seed.
    If you want Kentucky bluegrass--use sod. Let the experts grow it for you.
  6. Smallaxe

    Smallaxe LawnSite Fanatic
    Messages: 10,082

    Agreed... but it would be good to know whether the client is able to sustain such an expensive lawn... you showed pictures of a hydroseeded lawn that ended up producing a healthy crop of CG so unless the client has the resources to protect the sod from utter destruction, he might have to ,,, play it safe...
  7. what depth was the sample taken at?

    What was the cec?

    I believe the p2o5 is to low.....helps with stress

    Low maintence lawn.........consider the fine a lot here, and we have much more heat!

    I grown turfgrass in northern Ill.
  8. CK82

    CK82 LawnSite Member
    Messages: 236

    Sample was taken at about 4"+ depth.

    What is cec?
  9. CK82

    CK82 LawnSite Member
    Messages: 236

    I don't believe they tested for cec, if you are referring to cation exchange capacity?
  10. Labs assume sample depth is 6" all your values are off

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