Iron for dark green

Discussion in 'Pesticide & Herbicide Application' started by RigglePLC, Sep 6, 2018.

  1. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 15,036

    Iron will darken the color of your green grass by adding a slight stain of black color.
    Can you see the strip of darker green?
    This is ferrous sulfate " for correcting iron deficiencies" in the garden.

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  2. Mr Efficiency

    Mr Efficiency LawnSite Bronze Member
    Messages: 1,090

    I am a big iron guy, the more the better. My fav fert is a 25-0-6 with 5% iron . For guys that leave fertilizer in the road or on walkways Iron in a fert is not for them.
     
  3. Mr Efficiency

    Mr Efficiency LawnSite Bronze Member
    Messages: 1,090

    I Can see it slightly Reggle
     
  4. Digitaria Sanguinalis

    Digitaria Sanguinalis LawnSite Senior Member
    Messages: 270

    Iron is a northern thing. From personal experience it does very little except stain concrete for the warm season guys.
     
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  5. Mr Efficiency

    Mr Efficiency LawnSite Bronze Member
    Messages: 1,090

    I've never had a problem with iron staining because every single application we do we blow off any materials back onto the turf areas. We not only do that so there's no staining we do that for environmental issues if you leave fertilizer in the road or the driveway or the sidewalk it will end up in a storm drain then the river than the ocean
     
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  6. Delmarva Keith

    Delmarva Keith LawnSite Senior Member
    Messages: 473

    Apply ferrous sulfate with a couple ounces per 1,000 of ammonium sulfate and use NIS in the tank. It will green up. Foliar iron needs some N for uptake and metabolizing. I’ve tested just applying ferrous sulfate alone with no response (other than blackening from an excessive rate to try to get some response). Adding the ammonium sulfate is necessary.

    For cool season grass, don’t apply more than 2 oz ferrous sulfate per 1,000 per app and reduce rates when it’s hot. More than that can cause blackening. The blackening is a toxic reaction to excessive iron. Way too much will kill the grass (I forget now how much is fatal, but my recollection is it’s a lot beyond just some blackening).

    E.g. http://archive.lib.msu.edu/tic/tgtre/article/1999feb1a.pdf
     
    Last edited: Sep 7, 2018
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  7. landandtree

    landandtree LawnSite Member
    Messages: 24

    couldnt the nitrogen in the AS be causing the green up? many people believe that iron is the only way to green up but recent studies suggest that that is not always the case
    http://edis.ifas.ufl.edu/ep551
     
  8. Delmarva Keith

    Delmarva Keith LawnSite Senior Member
    Messages: 473

    It can — if there is N deficiency, N alone will get a response. If there is iron or iron and N deficiency, iron and N will get a response; N alone won’t or, depending on how bad the iron deficiency is, won’t get as good a response as iron and N. If there is a severe iron deficiency, N alone will make it worse.

    To get the plant to take up the iron and use it, it needs N (either adequately pre-existing or added to the foliar spray). A little bit of a catch 22. To use iron for green up and avoid N, you need to supply N. The negligible amount of N in a couple oz of AS isn’t enough to push growth, just enough to get the plant to take up the iron.
     
  9. woodlawnservice

    woodlawnservice LawnSite Bronze Member
    Messages: 1,103


    Makes all the difference on my warm season Bermuda! Very very noticable. As stated, more the better.
     
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  10. woodlawnservice

    woodlawnservice LawnSite Bronze Member
    Messages: 1,103

    Iron vs no iron warm season common bermuda...

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