Is there such a thing as too much IRON?

Discussion in 'Pesticide & Herbicide Application' started by AmGreen, Dec 29, 2008.

  1. AmGreen

    AmGreen LawnSite Senior Member
    Messages: 319

    I've always included IRON in my fert program - typically a 6% along with the normal lb per 1000 N with good color results.
    The other day I was riding through a "ritzy" neighborhood looking for potential customers. I came up on a few houses with the darkest green fescue you've ever seen - almost to the point of looking black. Obviously it was the IRON but how much? Are they spraying or spreading? Anyone with ideas...
  2. jimmyzlc

    jimmyzlc LawnSite Senior Member
    Messages: 376

    You can always get to much of something. I put just enough Iron down to give it some pop. No idea on application method, but I would not think dry would make it look black.
  3. FdLLawnMan

    FdLLawnMan LawnSite Bronze Member
    Messages: 1,250

    If you mean could it damage the turf, not sure but you would have to put an awful lot on to do that. Depending on the type of iron and how much is applied it will turn the turf almost black. All the iron is basically doing is internally and externally staining the plant. The more you apply, the darker it will get.
  4. SpreadNSpray

    SpreadNSpray LawnSite Senior Member
    from MN
    Messages: 363

    In my experience, iron will help but can only do so much. More depends on the type and hybrid of grass for exceptional color.
  5. bug-guy

    bug-guy LawnSite Bronze Member
    Messages: 1,032

    i was always told the lawn will only take up as much as it was possible and the rest was a waste. also possible wash off and staining concrete(liq apps).
    i have seen liquid apps turn lawns really dark/black several times.
    once a agition belt broke and the iron settled to the botom
    many other times the lawn was just cut and then sprayed on a hot day

    NEW CITY LAWN CARE LLC LawnSite Bronze Member
    Messages: 1,271

    I would assume this be true, I'm guessing plants are just like us, we can take vitamins everyday, and our body will only absorb what we need or what we have deficiencies in, nothing more.
  7. Kiril

    Kiril LawnSite Fanatic
    Messages: 18,334

    I'll add that generally most soils are not iron deficient, it is just not available for plant uptake. Perhaps instead of adding more iron, you might look for ways to make the iron that is already there available.
  8. Ric

    Ric LawnSite Fanatic
    Messages: 11,969


    I think you are asking the wrong question. Maybe you should be asking What elements or combination of elements in what form caused that lawn to be almost black green. Iron is only one element and the form of iron along with what other elements it reacts with might be the answer you are seeking.
  9. Grassmechanic

    Grassmechanic LawnSite Silver Member
    Messages: 2,697

    Back in the golf course days, a week or two before a big tournament, we'd apply liquid iron at 9-12 oz/1000 along with about 1/4# ammonium sulfate to the approaches and around the green. This would turn the grass dark green, almost to the point of being black. It was a big hit with the golfers. The green itself stood out and the topograpy was easier to see for undulations when taking an approach shot. Of course we used nothing but pure white sand in the traps to enhance the visual effect.

    DUSTYCEDAR LawnSite Fanatic
    from PA
    Messages: 5,132

    toooooooo much and it will turn black not good

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