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Fiesta Selective Post-Emergent Turf Weed Killer

SKU: 613924
Regular price $79.25
Unit price

Fiesta Selective Weed Killer (For Spraying on Turf to Kill Only Weeds)

(Excludes 2.5 Gallon)!!!


Fiesta® Selective Weed Killer is a selective, broadleaf weed killers that kill only the weeds and not the desired turf.  Using a specially formulated iron solution, Fiesta is a game changer in the organic lawn care industry, the first effective weed killers that do not contain toxic synthetic compounds.  The choice of professional applicators, these iron-based weed killers leave lawns healthy and weed-free!

Fiesta works quickly, delivering visible same-day results, even in cool weather. With a unique ground breaking iron-based formulation, Fiesta is highly effective and have no unpleasant odor. Pets and people can re-enter the treated area as soon as the spray is dry, the minimal period allowed by the EPA. Suitable for broadcast application (entire lawn) or spot treatment, Fiesta and Captain Jack's Lawnweed Brew help your lawn look its best without toxic, environmentally-harsh synthetic chemicals. 

The top choice of professionals, we are now excited to offer Fiesta in smaller, more home friendly sizes under the Captain Jack's Lawnweed Brew label!  Now you can treat your own lawn with professional-grade results! 

*Compared to Iron-X™ and Pulverize weed killer for lawns, Fiesta and Captain Jack's Lawnweed Brew are the same formulations available for much lower prices; but with the great technical service from the scientists at!

Fiesta Benefits

  • Liquid selective herbicide that effectively kills broadleaf weeds in the lawn.
  • Works fast and weed control can be seen in the same day.
  • Three benefits from one application – green-up, post emergent broadleaf weed control, and early post emergent crabgrass control (up to the four-leaf stage) per three years of data from Rutgers University.
  • Made with iron, Does Not contain the synthetic weed chemicals 2,4-D or Dicamba!
  • People and pets can enter treated area when spray dries.
  • No unpleasant odor.
  • Rain-fast in 3 hours.
  • Effective even in cool weather.
  • The exact same product ingredients as Iron X!™ Selective Weed Killer at about 1/8 the price!

Fiesta Application Instructions


Large Areas (Broadcast Sprays):

  1. Add 5 oz. of Fiesta per gallon of water.
  2. Apply 2.5 gallons of water per 1,000 sq. ft. (or 12.5 oz. product per 2.5 gallons of water per 1,000 square feet).
  3. Repeat in 3-4 weeks for optimal knockdown of weeds.

Spot Sprays:

  1. Use 5 oz. of Fiesta per gallon of water and spray enough to wet weeds as needed.

    Fiesta General Application Notes:

    • Thoroughly spray weeds to point of runoff.
    • Ensure turf is well watered prior to application.
    • Do not apply when the daytime temperature will be below 50°F or above 85°F.
    • Do not apply to bentgrass.
    • Iron can stain some stone, concrete, clothes, equipment and other such things. Any desirable plants or structures accidentally contacted should be rinsed with water.
    • Do not apply to stressed lawns, such as drought stress.
    • Use standard spray equipment, with a coarse nozzle, such as a hand-held or backpack sprayer.  Hose-End sprayers are not compatible.
    • Repeat treatment in 3 to 4 weeks for best results and a longer-lasting weed kill.
    • Occasionally a darkening of the grass leaf blades can occur; however the grass will recover within a few days to weeks.
    • Allow 3 hours before rain or watering so the product can dry.
    • Do not apply during windy conditions to avoid over-spray.
    • May leave a rusty stain on concrete, pavers or other lightly colored areas; avoid such areas when spraying turf.

    Fiesta Active Ingredient


    Iron HEDTA (FeHEDTA) ............ 26.52%


    Fiesta Available Sizes

    • 1 Gallon (covers 10,000 square feet).
    • 2.5 Gallon (covers 25,000 square feet).
    • 200 Gallon Tote Concentrate

    For smaller concentrated and ready-to-use formulas for your selective weed killer needs, check out Captain Jack's Lawnweed Brew Post-Emergent Turf Weed Killer!



      Our sister company, Green Earth Ag & Turf, brings a decade of experience as the U.S. leader in providing Professional Landscapers, Farmers and Indoor Growers like you the best in organic products for higher yields, aesthetics and profits!  Discounted professional or wholesale prices can be found there.

      to quickly and easily open a wholesale account with us or to get bulk and professional pricing. 

      You can also contact us directly at (866) 374-5101 or for the top technical and customer service in the industry.  

      Leave Us A Review!

      Customer Reviews

      Based on 7 reviews
      Somewhat Good - Mostly Not

      I live in New Jersey near the coast. I had out of control spurge, oxalis, nutsedge and crab grass. My first application was with a hose sprayer because it was hard to find actual application instructions. Instructions weren't with the gallon size I purchased. I saw only slight results. I then did a hand held sprayer and mixed the proper ratio from the instructions I found on the website. This seemed to brown some leaves but didn't knock the weeds out. Some weren't affected at all. I then doubled the concentration and tried spot spraying. I sprayed directly on neighbors out of control weeds climbing then fence and the stronger mix seemed to eventually kill those. But only after multiple direct sprays. However this product drips right off oxalis so it doesn't affect it at all. And in the higher concentration I found it actually killed my turf grass never to come back. It turned black and stayed black. There was no greening benefit at all. I did treat in the summer though, maybe fall or spring would be better. For me it only works in strong concentrations directly applied to weeds over multiple applications in a mulch bed. For the price and what it actually does - I don't think it is worth it. Glad it is natural and non toxic but I found it mildly affective. The video seems impressive but there should be a better video tutorial and real life lawn scenarios to demonstrate the product.

      Kathy D.
      It works on lesser celandine!!

      I've been fighting lesser celandine (AKA Ficaria verna, Ranunculus ficaria) in my yard and garden for some years now. This plant is a homeowner's nightmare-- it looks very pretty at first but it takes over everywhere, it's nearly impossible to dig out, and extremely hard to kill even with glyphosate. But this product works! You have to follow the directions and apply it at a heavy rate on this particular weed, but it seems to be doing the trick. Maybe I can get my lawn back!!

      This stuff works!!!

      We’ve been trying to rehab a lawn that was neglected for years by the prior owners, and after buying a smaller bottle of an iron-based selective herbicide here and there for a few years, I finally decided to get a 3gal sprayer and a 2.5gal container of Fiesta, and soaked our entire front yard once at the beginning of May and again at the beginning of June last year. That, along with applications of natural fertilizer, overseeding the bare patches, and mowing high, has taken our lawn from one of the worst to one of the nicest in our neighborhood. I just re-treated the strip of lawn on our easement because it didn’t have much grass to start with and had pretty heavy weed pressure. The only thing this doesn’t work well on in our yard is violets, I’m not willing to use more toxic options so I’m just going to make sure that the grass can out-compete them!

      Great Animal Safe Herbicide

      We have horses and dogs. Trying to find a safe herbicide especially for horses is difficult. The Fiesta at a 7.5 oz/gal rate did a great job of killing the poisonous Spurge and buttercups out of the horse pastures. Plants showed some withering the next day (60degF). It took 2 weeks after application to get the plants to completely wither and die. Grass actually got greener in areas that the Fiesta was sprayed. Probably due to extra iron for the grass. Make sure to soak plants you are trying to kill.

      Jeremy C.
      Kills weeds pretty well!

      I can’t give this product 5 stars because it just isn’t concentrated enough. 10oz per gallon of water is a lot of product to use when spot spraying… especially when you consider these chemicals go at 1oz per gallon usually. For the price, I feel it should go further and be more effective. If these organic companies want to make some real headway, they will need to make this stuff a bit cheaper and more concentrated.