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Hi-Yield (33691) Super Concentrate Killzall Weed & Grass Killer (16 oz)

4.4 4.4 out of 5 stars 2,929 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Weed Killers by Hi-Yield
$14.93 $0.93 per Ounce
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16 oz
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Purchase options and add-ons

Brand Hi-Yield
Item Weight 16.64 Ounces
Liquid Volume 16 Fluid Ounces
Item Form Liquid
Active Ingredients double-surfactant

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. 16 oz. covers up to 3,200 sq ft.
  • 16 oz bottle of weed control liquid concentrate can treat up to 3,200 square feet.
  • See label for application instruction. Spraying accessory required for application.

Frequently bought together

Hi-Yield (33691) Super Concentrate Killzall Weed & Grass Killer (16 oz)
$14.93 ($0.93/Ounce)
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Chapin 20000 Made in USA 1 -Gallon Lawn and Garden Pump Pressured Sprayer, for Spraying Plants, Garden Watering, Weeds and Pe
$14.98
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Chapin 16200 2-Gallon Made in USA Garden Pump Sprayer with Ergonomic Handle, Trigger Shut Off, Adjustable Cone Nozzle and in-
$14.97
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Product details

  • Is Discontinued By Manufacturer ‏ : ‎ No
  • Product Dimensions ‏ : ‎ 3 x 3 x 7 inches; 1.04 Pounds
  • Item model number ‏ : ‎ 33691
  • Date First Available ‏ : ‎ May 9, 2011
  • Manufacturer ‏ : ‎ Arett Sales - LG
  • ASIN ‏ : ‎ B001PCYIF0
  • Customer Reviews:
    4.4 4.4 out of 5 stars 2,929 ratings

Product Description

Hi-yield weed grass killer weed killer concentrate

Super Concentrate Killzall Weed & Grass Killer

Short, concise consumer-friendly label. Non-selective weed and grass killer, contains a double-surfactant formulation that dries on plant fast to start working quickly. Multiple use formulation...near fences, in paths, patios, sidewalks, curbs and driveways. DO NOT USE IN LAWNS. Use around ornamental trees, shrubs, flower beds and buildings. Labeled for lawn renovation, brush and vine control and stump treatment.

USE INSTRUCTIONS

For best results use 2 1/2 fl. oz. (5 Tbs.) per 1 gallon of water. One gallon of water will treat approximately 300 sq. ft. Direct spray on undesirable weeds and grasses in and around flower beds, ornamental trees, fruit and nut trees, grapevines, shrubs, fences, driveways and walkways. Spray when air is calm. For use in preparing areas for planting of ornamentals, trees, shrubs, desert landscapes, rock gardens, flower beds or similar plantings. Treated areas can be planted 1 day after treatment. To control brush or vines apply to green and actively growing brush or vines. For plants taller than 5 feet, cut them back and spray the regrowth.

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Customer reviews

4.4 out of 5 stars
4.4 out of 5
2,929 global ratings

Customers say

Customers like the value, performance, and speed of the weed moss control agent. They mention that it's a great buy, does a good job at killing weeds and grasses, and is effective against a wide range of weed and grass types. That said, opinions are mixed on quality.

AI-generated from the text of customer reviews

149 customers mention105 positive44 negative

Customers like the performance of the weed moss control agent. They say it's excellent for killing unwanted vegetation, kills weeds very quickly, and is effective against a wide range of weed and grasses, including tough perennials. Some say it works perfect on all types of worms and grass, making it super easy to remove the worm after they are dead.

"...Even after it rained for a few days, no weeds came back. I’ll be using this from now on" Read more

"Worked perfect on all types of weeds and grasses. Don't expect immediate results...." Read more

"...Dont use it near wells or pets or runoff. It will kill anything it touches without discrimination. Wear a mask, gloves and skin protection." Read more

"Kills weeds, but takes longer than other products. Mix on the strong side and give it a week after spraying to see results." Read more

41 customers mention35 positive6 negative

Customers like the value of the weed moss control agent. They mention it's a cost-effective option for larger areas or multiple applications, and a great buy.

"took a couple weeks to see results. good value at 2.5 oz. pg but longevity remains to be seen. standard formula not extended." Read more

"Amazon price very competitive. I have used this product for over nine years and it works great." Read more

"Easy to use and very good cost to use ratio." Read more

"...This makes it a cost-effective option for larger areas or multiple applications...." Read more

21 customers mention18 positive3 negative

Customers like the speed of the weed moss control agent. For example, they mention it works faster than other products, it comes extremely fast, and it takes several days to see results. That said, some say it takes time but is very thorough.

"...I use it alone and it is perfect! Not fast like many of these weed-killers say, no, it's the waiting game eve on the big, back jug, O!..." Read more

"...It’s amazing and efficient and makes it super easy to remove the weeds after they are dead." Read more

"...It is a contact killer, BUT it works slowly and takes several days to see results...." Read more

"put it in a bottle sprayer hooked to a hose, no pumping, job is done quickly." Read more

19 customers mention19 positive0 negative

Customers find the weed moss control agent easy to mix and use. They say it comes with good mixing instructions and is perfect for simple use. Some customers even like that you can pre-mix it for your needs.

"Easy to use and last for a long time" Read more

"Easy to use and very good cost to use ratio." Read more

"I use this stuff in a sprayer for all my weeds on my property. It’s so easy to mix and it lasts a while!!..." Read more

"...Not literally. Wake up!I think this is perfect for simple use and it lasts longer than they claim...." Read more

291 customers mention187 positive104 negative

Customers are mixed about the quality of the weed moss control agent. Some mention that it works quite well, is brutally effective, and is perfect. Others say that it takes time to work, does not work as good as other ones, and has a slow kill.

"This worked way better than round up! You definitely have to be patient and wait a week or so, but then the weeds are gone and nothing comes back!..." Read more

"It's working as expected by killing off grass, weeds and even some mold that was growing on my stepping stones...." Read more

"Kills weeds, but takes longer than other products. Mix on the strong side and give it a week after spraying to see results." Read more

"...; some weeds might need to be sprayed twice, but overall, the product works quite well. I will now be ordering the larger bottle...." Read more

14 customers mention7 positive7 negative

Customers are mixed about the durability of the weed moss control agent. Some mention that it seems to last longer, while others say that it's not as strong as advertised, does not last, and the bushes are growing stronger than ever.

"...it can take up to 2 weeks to work, BUT once it does it has great longevity and results!!!..." Read more

"...Do NOT spray this near plants you want to keep alive. They WILL die...." Read more

"...It’s so easy to mix and it lasts a while!! One thing i will say is it usually takes a day or two for all the weeds to die...." Read more

"It doesn’t keep well, but it does kill well. I mix a higher concentration in a pump sprayer...." Read more

It worked after a little while longer
4 Stars
It worked after a little while longer
Sprayed some areas with the mixture. Thought it was no good, after 9 days going on 10. It finally took affect and worked.
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Top reviews from the United States

Pamela Hutchins
5.0 out of 5 stars Amazing stuff
Reviewed in the United States on May 1, 2024
Size: 1Verified Purchase
This worked way better than round up! You definitely have to be patient and wait a week or so, but then the weeds are gone and nothing comes back! Even after it rained for a few days, no weeds came back. I’ll be using this from now on
2 people found this helpful
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Tim
5.0 out of 5 stars Takes a while to work.
Reviewed in the United States on April 2, 2024
Size: 1Verified Purchase
Worked perfect on all types of weeds and grasses. Don't expect immediate results. When applied in sunlight it took 7-10 days to finally see weeds turn brown and die.
2 people found this helpful
Helpful
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Swish247365
4.0 out of 5 stars So far so good...
Reviewed in the United States on April 9, 2024
Size: 16 ozVerified Purchase
It's working as expected by killing off grass, weeds and even some mold that was growing on my stepping stones. Ordered a 2nd bottle for the rest of the yard!
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Matthew H.
5.0 out of 5 stars Works
Reviewed in the United States on March 28, 2024
Size: 1Verified Purchase
Kills weeds, but takes longer than other products. Mix on the strong side and give it a week after spraying to see results.
3 people found this helpful
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M&M
5.0 out of 5 stars Takes 3-7 days to start working
Reviewed in the United States on April 21, 2024
Size: 1Verified Purchase
I ordered a small bottle to test it out and it works great. I have a 2 acre property, so I have plenty of different kind of weeds; some weeds might need to be sprayed twice, but overall, the product works quite well. I will now be ordering the larger bottle.

Improvement for company: I would recommend to add a measuring cap to make it easier for the customer to use. I just poured it into a 4 liter container, hoping I hit the 1 teaspoon amount.
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Wesley
5.0 out of 5 stars It will kill ANYTHING in it's way!
Reviewed in the United States on May 2, 2024
Size: 1Verified Purchase
I use this to weed a very dangerous slope in my backyard, It's to steep to weed-eat or even mow so I take this to it once or twice a year with a really powerful sprayer and it works WONDERS!
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J. Brown
3.0 out of 5 stars Does not work as good as other weed killers
Reviewed in the United States on April 24, 2024
Size: 1Verified Purchase
Wanted to try another weed killer but this one does not work as good as other ones. You have to use more of the concentrate to make it work. Your better off using a good mask and using other weed killers.
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Michael Thompson
5.0 out of 5 stars 🚨🧨🚨IF U READ instructions/information….
Reviewed in the United States on March 23, 2024
Size: 16 ozVerified Purchase
🚨🧨🚨For all the ones saying “It doesn’t work”, YES it does, read the instructions/information completely. This is NOT a quick fix. Depending on what type of weed, brush, vine, bush etc u r trying to kill, it can take up to 2 weeks to work, BUT once it does it has great longevity and results!!! I don’t have to spray weeds but a couple times during growing season.
I noticed comments about “ it killing everything”, AGAIN READ THE INFORMATION…it’s a KILLER. It WILL kill anything u put it on, so don’t spray it when it’s any kind of wind or breeze if possible. U also HAVE TO PAY ATTENTION, hold your spray wand close to what u r trying to spray to help avoid what u do not want to kill!! Leaving a bad review because of NOTHING the product did/didn’t do, but because of buyer negligence to READ/FOLLOW instructions is beyond irresponsible and irritating.
27 people found this helpful
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