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Fiesta Weed Killer

4.1 out of 5 stars 1,003 ratings
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Technical Details

Manufacturer reference ‎30550
Parcel Dimensions ‎28.8 x 17.9 x 11.6 cm; 5.65 kg
ASIN ‎B0851QQ398

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Fiesta Weed Killer

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Product details

  • Parcel Dimensions ‏ : ‎ 28.8 x 17.9 x 11.6 cm; 5.65 kg
  • Date First Available ‏ : ‎ Jan. 28 2021
  • ASIN ‏ : ‎ B0851QQ398
  • Manufacturer reference ‏ : ‎ 30550
  • Customer Reviews:
    4.1 out of 5 stars 1,003 ratings
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Customer reviews

4.1 out of 5 stars
1,003 global ratings

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Customers say

Customers like the effectiveness, ease of use, and speed of the product. They mention it kills weeds after two applications, is easy to apply by spray tank or attachment on their hose, and the measurements are dead easy to follow. Customers also appreciate the capacity, saying it's enough to do a half acre lot twice with some left for spot treatment. They also like the odor, concentration, and appearance. However, some customers disagree on the appearance and conditioning.

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EffectivenessEase of useSpeedCapacityOdorConcentrationAppearanceConditioning
265 customers mention "Effectiveness"192 positive73 negative

Customers like the effectiveness of the product. They mention it seems to kill the weeds after two applications, works wonders for them, and is a much better alternative to Weed B Gon. Customers also say it doesn't cause any harm to bees, animals, or the environment.

"...to work exactly the same with iron being the main agent that kills the weeds and not the grass...." Read more

"...so you can do it yourself as much as you think needs doing with no harm to the grass...." Read more

"...It took 3 or 4 applications over 2 weeks or so, but it is excellent. Great results." Read more

"...This Fiesta Weed Killer does not work on weed grasses. This is broadleaf weed product as specified by the producer...." Read more

23 customers mention "Ease of use"19 positive4 negative

Customers find the product easy to use. They mention the good instructions on the bottles make it easy to apply by spray tank or attachment on their hose. They also say the measurements are dead easy to follow per L of water and it's pretty idiot-proof assuming you can figure out how.

"Excellent product very easy to use .Kills broadleaf weeds and gets rid of pesky crawling vines .Will be buying more as needed ." Read more

"...sized lawn (I have at least a full season's worth) and it's pretty idiot proof assuming you can figure out how to use a sprayer...." Read more

"Stop paying for lawn service, easy to use, safe and effective" Read more

"...] I found this product to work fairly well It’s easy to use but will require several treatments. I recommend this and will purchase again." Read more

17 customers mention "Speed"12 positive5 negative

Customers like the speed of the product. They mention it's fast-acting, effective immediately, and very efficient.

"...The setting was 42, the results were swift and deadly. I sprayed the whole yard while adding extra attack on the highest infested regions...." Read more

"...This product gives very quick results you can see!" Read more

"...spray a large area so spot spraying is required which is time consuming on a large area. It does work well if you put in the time." Read more

"...Way faster than spot treating each weed and the lawn looked greener from the iron too." Read more

10 customers mention "Capacity"10 positive0 negative

Customers like the capacity of the product. They mention it's enough to do a half acre lot twice with some left for spot treatment. Customers also say the 4 liter container is good for about 100 applications and will last a long time.

"...It goes a long way and lasts several applications. It’s a lot in a jug so lasts a while. Be patient. Yes dandelions will brown. So will clover...." Read more

"...satisfied with this product, which makes approximately 100 liters of effective weed control that you can reapply to spots you've missed as these..." Read more

"...200ml per 5L water (my handheld sprayer is 5L) and roughly good for 25m2 of lawn...." Read more

"...I have an unusual about of weeds this summer. Lot’s left in jug and I mixed as directed with a bit more Fiesta , good for a couple of years." Read more

7 customers mention "Odor"7 positive0 negative

Customers are satisfied with the odor of the product. They mention it works great and eliminates noxious weeds from their yards.

"...However, I can confirm that the very noxious weed we have appears to be dying...." Read more

"Quickly kills Dandelions, thistles, plantain, and other common weeds. Also to my surprise it worked on creeping charlie too." Read more

"Works well on dandelions and some other broadleaf weeds. It does not work on crab grass...." Read more

"It's not perfect but it does reduce the volume of dandelions and other weeds. More than one application is required...." Read more

5 customers mention "Concentration"5 positive0 negative

Customers like the concentration of the product. They mention it's a lot in a jug, so it lasts a while.

"...It goes a long way and lasts several applications. It’s a lot in a jug so lasts a while. Be patient. Yes dandelions will brown. So will clover...." Read more

"...It's also concentrated so you can mix how much you need per spray...." Read more

"It is concentrated and water needs to be added. A much better value than other popular brands. The weeds have not grown back." Read more

"Same active ingredients as Weed B Gon but more concentrated. Ends up being about ⅓ the price of the Weed B Gon concentrate!" Read more

12 customers mention "Appearance"8 positive4 negative

Customers have mixed opinions about the appearance of the product. Some mention the grass looks better overall, while others say some leaves are visibly blackened. Some say the green color is vibrant and they can now see grass instead of weeds.

"...The grass looks better though overall. If anyone knows what this stuff growing is I'd be grateful" Read more

"...Some dandelion turning black. One section was a little crab grass has exploded to more crab grass never seen so thick...." Read more

"...on the lawn, Fiestas ingredient chelated iron will make the grass a beautiful dark green. The dark green lasts about 10-14 days...." Read more

"...Within just a day, I could see a huge difference, and my lawn looks so much better now...." Read more

9 customers mention "Conditioning"6 positive3 negative

Customers have mixed opinions about the conditioning of the product. Some mention it will last a very long time and will require several treatments. Others say the dark green lasts about 10-14 days and requires lots of work to maintain.

"...It goes a long way and lasts several applications. It’s a lot in a jug so lasts a while. Be patient. Yes dandelions will brown. So will clover...." Read more

"...this product to work fairly well It’s easy to use but will require several treatments. I recommend this and will purchase again." Read more

"...left in jug and I mixed as directed with a bit more Fiesta , good for a couple of years." Read more

"...The dark green lasts about 10-14 days. Iron is the same ingredient that most "green your lawn" type products use...." Read more

It’s what the pros use in canada!
5 out of 5 stars
It’s what the pros use in canada!
Slowly but surely this stuff works! Bought this after noticing it was what all the big companies used for lawn treatments. I mixed it 1 part to 24 parts to water in a 2 gallon sprayer and added a tablespoon of dish soap as a surfactant (although I may have been better off using a specifically made surfactant). The concentration used was 316 ml/ 2 gallons. Not sure how exact it needs to be but I used a slightly under filled 12 oz disposable plastic cup to measure the concentrate. I over-seeded the lawn a couple days later. For my front and back yard I used 4 gallons (~630ml out of 4 litres of concentrate) so I should be able to get a total of 6 treatments out of 1 bottle (~25$/treatment). I sprayed heavier on spots with dandelions and other prominent weeds. The video shows the before and the picture is a couple days later after a single treatment. Biggest change noticed was with the dandy lions, the clover will most likely take a few seasons of treatment to notice a big difference. Importantly it didn’t seem to harm my grass at all.
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Top reviews from Canada

  • tommy g
    5.0 out of 5 stars Best Herbicide for canada!
    Reviewed in Canada on June 10, 2025
    Verified Purchase
    This stuff works amazingly well. Tried XLR8 from the US, worked ok on crabgrass but thats it. Researched my weed and its called Speedwell and then found this product in my research as a reco and happy to find it on 鶹.ca. It worked great, killing the speedwell and other broadleaf weeds in my lawn including clover, then used my dethatcher to pull up all the dead stuff, then my lawn mower to suck it all up into the bag. Will definitely be buying more in the future - best legal stuff for Ontario!
    Helpful
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  • Beth-Lynn
    4.0 out of 5 stars Patience and it lasts
    Reviewed in Canada on May 27, 2025
    Verified Purchase
    We purchased this knowing that lawn care companies in Canada use it, and knowing that dicamba and tryplocor are unavailable here and would work faster and better. This is straight up iron. It’s a deep red rust colour and you will see your lawn darken for a few days (but not brown) after using it. You need a 2-gallon sprayer on fan mode. There are websites that give a ratio of water to product better than the bottle does so you know what strength to use for best effectiveness for your efforts. It goes a long way and lasts several applications. It’s a lot in a jug so lasts a while. Be patient. Yes dandelions will brown. So will clover. Well established clover will take several spaced apart applications. Creeping Charley is a no, it won’t touch it. It’s broadleaf only. Remember lawn companies often just spot treat. They don’t do a full service after maybe one time. This for the money gives you control so you can do it yourself as much as you think needs doing with no harm to the grass. Way better than the hundreds lawn services charge for the same product.
    One person found this helpful
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  • Prajwal Pinto
    5.0 out of 5 stars Kills weeds like a pro
    Reviewed in Canada on June 2, 2025
    Verified Purchase
    I've always been using weed b gon max until a neighbour told me about Fiesta. This one's exactly the same from the chemical composition and seems to work exactly the same with iron being the main agent that kills the weeds and not the grass. But the beauty about this is that it does it at a fraction of the cost. One can of this makes 100 litres of weed killer.

    I sprayed it in my yard in the evening and saw the next day the weeds were dying.

    This is also the same thing that pro lawn care companies use in canada.
    4 people found this helpful
    Helpful
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  • Oggy Oggy
    5.0 out of 5 stars It’s what the pros use in canada!
    Reviewed in Canada on May 22, 2025
    Verified Purchase
    The media could not be loaded.
    Slowly but surely this stuff works! Bought this after noticing it was what all the big companies used for lawn treatments. I mixed it 1 part to 24 parts to water in a 2 gallon sprayer and added a tablespoon of dish soap as a surfactant (although I may have been better off using a specifically made surfactant). The concentration used was 316 ml/ 2 gallons. Not sure how exact it needs to be but I used a slightly under filled 12 oz disposable plastic cup to measure the concentrate. I over-seeded the lawn a couple days later. For my front and back yard I used 4 gallons (~630ml out of 4 litres of concentrate) so I should be able to get a total of 6 treatments out of 1 bottle (~25$/treatment). I sprayed heavier on spots with dandelions and other prominent weeds.

    The video shows the before and the picture is a couple days later after a single treatment. Biggest change noticed was with the dandy lions, the clover will most likely take a few seasons of treatment to notice a big difference. Importantly it didn’t seem to harm my grass at all.
    Customer image
    Oggy Oggy
    5.0 out of 5 stars
    It’s what the pros use in canada!

    Reviewed in Canada on May 22, 2025
    Slowly but surely this stuff works! Bought this after noticing it was what all the big companies used for lawn treatments. I mixed it 1 part to 24 parts to water in a 2 gallon sprayer and added a tablespoon of dish soap as a surfactant (although I may have been better off using a specifically made surfactant). The concentration used was 316 ml/ 2 gallons. Not sure how exact it needs to be but I used a slightly under filled 12 oz disposable plastic cup to measure the concentrate. I over-seeded the lawn a couple days later. For my front and back yard I used 4 gallons (~630ml out of 4 litres of concentrate) so I should be able to get a total of 6 treatments out of 1 bottle (~25$/treatment). I sprayed heavier on spots with dandelions and other prominent weeds.

    The video shows the before and the picture is a couple days later after a single treatment. Biggest change noticed was with the dandy lions, the clover will most likely take a few seasons of treatment to notice a big difference. Importantly it didn’t seem to harm my grass at all.
    Images in this review
    Customer image
    One person found this helpful
    Helpful
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  • shunn
    1.0 out of 5 stars Didn't work
    Reviewed in Canada on May 2, 2025
    Verified Purchase
    I have bought two of these things in the last year and the clovers keep coming back. I am not sure if it is me not knowing the right way to apply it. It seems to make an effort to kill the weeds but just at the tips! Very frustrating. I won't be buying any more of it.
    6 people found this helpful
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  • Rob
    3.0 out of 5 stars Seems to be working
    Reviewed in Canada on May 12, 2025
    Verified Purchase
    Seems to be working. the clovers seem reduce has to apply again. I tried without surfactant as it was not approved for Canada. Some dandelion turning black. One section was a little crab grass has exploded to more crab grass never seen so thick. Its possible another product in combination caused it. I did a second application but crab grass seems to be be exploding and spreading instead of dying. I will update review in a few weeks if see any improvement on second application and if better or worse.
    One person found this helpful
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  • Tim G
    5.0 out of 5 stars Effective
    Reviewed in Canada on May 30, 2025
    Verified Purchase
    I mixed this up with my pump sprayer and I used a little more than directed, maybe 20% stronger. It made such a difference to a yard that was infested with weeds. It took 3 or 4 applications over 2 weeks or so, but it is excellent. Great results.
    One person found this helpful
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  • 鶹 Customer
    4.0 out of 5 stars Good product
    Reviewed in Canada on May 16, 2025
    Verified Purchase
    Did the job on dandelion especially
    2 people found this helpful
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