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Hi-Yield (33693) Super Concentrate Killzall Weed & Grass Killer (1 gal)

4.6 4.6 out of 5 stars 1,917 ratings

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Purchase options and add-ons

Brand Hi-Yield
Item Weight 10 Pounds
Liquid Volume 128 Fluid Ounces
Item Form Liquid
Active Ingredients Glyphosate

About this item

  • Weed killer controls grasses, broadleaf weeds and woody brush species. Do not use on lawns.
  • Contains a double-surfactant formulation that dries on plant fast to start working quickly.
  • Allows you to cover and treat large areas. 1 gal. covers up to 25,600 sq ft.
  • 1 gal bottle of weed control liquid concentrate can treat up to 25,600 square feet.
  • See label for application instruction. Spraying accessory required for application.

Customer ratings by feature

Easy to use
4.6 4.6
Value for money
4.3 4.3
Longevity
4.1 4.1

Frequently bought together

$56.99 ($0.45/Fl Oz)
Get it as soon as Wednesday, Mar 27
Only 11 left in stock - order soon.
Sold by Harwell's Green Thumb and ships from Amazon Fulfillment.
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$13.19 ($0.82/Fl Oz)
Get it as soon as Wednesday, Mar 27
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Hi-Yield (33693) Super Concentrate Killzall Weed & Grass Killer (1 gal)
Hi-Yield (33693) Super Concentrate Killzall Weed & Grass Killer (1 gal)
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Hi-Yield Killzall Weed And Grass Killer Concentrate
Details
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Price$56.99-18% $100.75
List:$122.14
$79.90-10% $84.40
List:$93.90
$17.36$70.00
Delivery
Get it as soon as Wednesday, Mar 27
Get it Mar 27 - 28
Get it Mar 27 - 28
Get it as soon as Wednesday, Mar 27
Get it Mar 28 - Apr 1
Customer Ratings
Easy to use
4.6
4.8
5.0
4.2
Value for money
4.3
4.7
5.0
3.5
Longevity
4.1
4.6
5.0
3.4
Sold By
Harwell's Green Thumb
Factory Hardware Store
Agromax, LLC
Keystone Pest Solutions
Harwell's Green Thumb
Beevie Supply
liquid volume
128 fluid ounces
2.5 gallons
2.5 gallons
2.5 gallons
16 fluid ounces
coverage
25600 square feet
Full
Refer to label for coverage information.
Please refer to product label for coverage
active ingredients
Glyphosate
Glyphosate - 41% with Surfactant
Glyphosate*, N-(phosphonomethyl)glycine, in the form of its isopropylamine salt . . . 53.8%
Glyphosate
form
Liquid
Liquid
Liquid
Liquid
weight
10 pounds
16 ounces
10.25 pounds

From the brand

Product information

Warranty & Support

Product Warranty: For warranty information about this product, please click here

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Hi-Yield (33693) Super Concentrate Killzall Weed & Grass Killer (1 gal)


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Product Description

HiYield
value
HiYield

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Customer reviews

4.6 out of 5 stars
4.6 out of 5
1,917 global ratings

Customers say

Customers like the quality, value, and performance of the weed moss control agent. For example, they mention it definitely kills weeds and grass, it does a better job of keeping the area weed free, and it's a great value for the money. That said, some say it'll save them money and be the most cost effective way to control fence lines and large areas in large gardens.

AI-generated from the text of customer reviews

153 customers mention115 positive38 negative

Customers like the performance of the weed moss control agent. They say it works well, gets the job done, and is the only product that works in weeds and areas where they don't want vegetation. It works great to kill Bermuda, running bamboo, and wandering Jew. However, it does not work over night or in a few days, and it does work on other grasses as well.

"Product worked well killing weeds even in gravel somewhat expensive but worth it." Read more

"Great product and did the job." Read more

"This product is the only product that works in the weeds and areas where I don't want vegetation. It keeps weeds away for months." Read more

"...Again. This product will kill all vegetation. It will not work in 4 days." Read more

128 customers mention100 positive28 negative

Customers like the quality of the weed moss control agent. They say it's the most effective weed killer they've ever used, it kills to the root, and it keeps the area weed free longer than other brands. Some customers even say it can even kill a whole tree.

"This is by far the best grass and weed killer I have used. I have tried many others but they always fail to control all types of weeds and the ones...." Read more

"...At least in my experience so far. It can even kill a whole tree if you drill into the trunk and pour a funnels worth in there. *..." Read more

"Trusted brand." Read more

"Takes time to kill weeds. Be patient…it works! Used it to kill weeds around kids dirt bike track" Read more

47 customers mention39 positive8 negative

Customers like the value of the weed moss control agent. They say it's a non-selective herbicide that does the job at the best price. Some customers also mention that it'll last the whole season and save them money. Overall, customers are satisfied with the value and quality of the product.

"...It is clearly less expensive, but not quite as effective...." Read more

"...Insanely high quality. While it is expensive, it is 100% worth it. Works better than or just as good as any other products I've used...." Read more

"It was good value for the money and it done a fantastic job I am sure next I will order some more" Read more

"...Product works great and it's a much better price than anything se at retail." Read more

19 customers mention16 positive3 negative

Customers like the durability of the weed moss control agent. They say it can last a very long time, even with two rainy seasons. Some customers also mention that the product is great for short-term use.

"This is a great product. easy to use and lasts at least six months." Read more

"...I will keep using it I like it better than round up and the bottle last longer. I just wish that it would keep the weeds away longer" Read more

"...It doesn’t last forever, but does last as long as the old ground clear! I just bought another gallon." Read more

"...Keeps a clean look, love it. Lasts longer than The expensive Round Up." Read more

Be patient
5 Stars
Be patient
Works well takes a couple days to work, but as long term results Even killed an entire paradise tree.
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Top reviews from the United States

Reviewed in the United States on February 18, 2024
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Reviewed in the United States on August 9, 2023
4 people found this helpful
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Reviewed in the United States on August 22, 2023
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Reviewed in the United States on August 25, 2023
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Reviewed in the United States on January 28, 2024
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Reviewed in the United States on December 13, 2023
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Top reviews from other countries

Maurice
3.0 out of 5 stars Not as effective as you might think.
Reviewed in Canada on September 8, 2020
2 people found this helpful
Report
Dan Thomsen
5.0 out of 5 stars Takes time but it works
Reviewed in Canada on May 13, 2021
Amazon Customer
1.0 out of 5 stars DID NOT KILL WEEDS
Reviewed in Canada on October 23, 2020
2 people found this helpful
Report
KM
4.0 out of 5 stars It works!
Reviewed in Canada on September 4, 2020