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frontpage Posted by Rokket | Staff • 2d ago
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frontpage Posted by Rokket | Staff • 2d ago

Prime Members: 16-Oz Roundup Weed & Grass Killer Concentrate

+ Free Shipping

$8.80

$21

58% off
Amazon
15 Comments 10,409 Views
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Deal Details
Amazon has for Prime Members: 16-Oz Roundup Weed & Grass Killer Concentrate on sale for $8.80. Shipping is free.

Thanks to Deal Hunter Rokket for finding this deal.

Features:
  • Roundup Weed & Grass Killer Concentrate kills tough weeds and grasses to the root, including dandelion, large crabgrass, poison ivy, clover (red & white), spotted spurge, and other broadleaf weeds
  • Roundup Weed & Grass Killer Concentrate is rainproof in as fast as 30 minutes and produces visible results in hours
  • Allows for planting 1 to 30 days after application (see booklet for details)
  • Use in flower beds, around trees, along fences, driveways and walkways, freshly cut woody stumps, in large areas for lawn replacement, garden plot preparation and other areas of your yard
  • Mix Roundup Weed & Grass Killer Concentrate according to label directions and spot treat or spray evenly each gallon of spray solution over 300 sq. ft. with a tank or hose-end sprayer

Editor's Notes

Written by citan359 | Staff
  • Our research indicates that this offer is $3.67 lower (29% savings) than the next best available price from a reputable merchant with prices starting from $12.47.
  • Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
  • If you're not a student, there's also a free 1-Month Amazon Prime trial available.

Original Post

Written by Rokket | Staff
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Amazon has for Prime Members: 16-Oz Roundup Weed & Grass Killer Concentrate on sale for $8.80. Shipping is free.

Thanks to Deal Hunter Rokket for finding this deal.

Features:
  • Roundup Weed & Grass Killer Concentrate kills tough weeds and grasses to the root, including dandelion, large crabgrass, poison ivy, clover (red & white), spotted spurge, and other broadleaf weeds
  • Roundup Weed & Grass Killer Concentrate is rainproof in as fast as 30 minutes and produces visible results in hours
  • Allows for planting 1 to 30 days after application (see booklet for details)
  • Use in flower beds, around trees, along fences, driveways and walkways, freshly cut woody stumps, in large areas for lawn replacement, garden plot preparation and other areas of your yard
  • Mix Roundup Weed & Grass Killer Concentrate according to label directions and spot treat or spray evenly each gallon of spray solution over 300 sq. ft. with a tank or hose-end sprayer

Editor's Notes

Written by citan359 | Staff
  • Our research indicates that this offer is $3.67 lower (29% savings) than the next best available price from a reputable merchant with prices starting from $12.47.
  • Don't have Amazon Prime? Students can get a free 6-Month Amazon Prime trial with free 2-day shipping, unlimited video streaming & more.
  • If you're not a student, there's also a free 1-Month Amazon Prime trial available.

Original Post

Written by Rokket | Staff

Community Voting

Deal Score
+36
Good Deal
Get Deal at Amazon

Price Intelligence

Model: Roundup Weed & Grass Killer₄ Concentrate, Use in and Around Flower Beds, Walkways and Other Areas of Your Yard, 16 fl. oz.

Deal History 

Sale Price
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Current Prices

Sort: Lowest to Highest | Last Updated 7/6/2025, 07:51 AM
Sold By Sale Price
Amazon$12.47
Blain Farm & Fleet$15.99
Ace Hardware$18.99

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Top Comments

thesandman
456 Posts
353 Reputation
This version is glyphosphate free if that is what you prefer
fsu67
564 Posts
379 Reputation
the 64oz and the one gallon bottle comes out a better deal if you need that much.

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2d ago
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2d ago
ekguru
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2d ago
1,610 Posts
https://www.sciencedirect.com/sci...9124009175
8
2d ago
456 Posts
Joined Jun 2006
2d ago
thesandman
2d ago
456 Posts

Our community has rated this post as helpful. If you agree, why not thank thesandman

Quote from ekguru :
https://www.sciencedirect.com/sci...9124009175

This version is glyphosphate free if that is what you prefer
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Original Poster
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Deal Hunter
2d ago
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2d ago
Rokket
2d ago
Original Poster
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Deal Hunter
40,857 Posts
This is Amazon's #1 seller in category "Weed Killers." nod
2d ago
564 Posts
Joined Dec 2012
2d ago
fsu67
2d ago
564 Posts

Our community has rated this post as helpful. If you agree, why not thank fsu67

the 64oz and the one gallon bottle comes out a better deal if you need that much.
1
Original Poster
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Deal Hunter
2d ago
40,857 Posts
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2d ago
Rokket
2d ago
Original Poster
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Deal Hunter
40,857 Posts
Quote from fsu67 :
the 64oz and the one gallon bottle comes out a better deal if you need that much.
Thank you, helpful. nod
Yesterday
2 Posts
Joined May 2024
Yesterday
BrightSummer725
Yesterday
2 Posts
Quote from ekguru :
https://www.sciencedirect.com/sci...9124009175
That article is about nematodes and yeast and this version doesn't even have the same active ingredients
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Scoreracing
Yesterday
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Our community has rated this post as helpful. If you agree, why not thank Scoreracing

Quote from thesandman [IMG]https://api-web.slickdeals.net/images/misc/backlink.gif[/IMG] : This version is glyphosphate free if that is what you prefer From Grok as I was interested between two formulas. This new formula appears could be in ground for UP TO 15 years and 200x more chronically toxic than glyphosate."Comparative Effectiveness- Broad-spectrum control: - Glyphosate is generally more effective for non-selective, broad-spectrum control, as it kills most plants down to the roots with a single application. It is particularly reliable for deep-rooted perennials and mixed weed populations. - New Formula is effective for mixed populations of grasses and broadleaf weeds due to the complementary actions of triclopyr (broadleaf) and fluazifop (grasses), with diquat providing quick burndown. However, it may be less effective on larger or perennial weeds due to diquat's contact-only action.- Specific use cases: - Poison ivy and woody plants: Triclopyr outperforms glyphosate for woody plants and vines like poison ivy, especially when applied to cut stems or foliage. - Grasses: Fluazifop is highly effective against grasses, potentially outperforming glyphosate for certain grass species. - Quick results: The new formula's diquat component provides faster visible results (hours vs. days), which may be preferred for aesthetic purposes, though it doesn't ensure root kill.- Limitations: - The new formula may require multiple applications for complete control of perennial weeds, as diquat only burns top growth. - Glyphosate's single active ingredient simplifies targeting all weeds, whereas the new formula's selective components (triclopyr for broadleaf, fluazifop for grasses) may not address all weeds equally well in every scenario.Health and Environmental Considerations- Glyphosate: - Linked to potential health risks, including non-Hodgkin's lymphoma, leading to its phase-out in consumer Roundup products. - Low environmental persistence (half-life ~6.5 days) and minimal soil activity reduce environmental impact.- New Formula: - Contains chemicals (diquat, triclopyr, fluazifop) that may pose greater risks for chronic health issues (e.g., reproductive dysfunction, kidney/liver damage) and environmental harm (e.g., toxicity to birds, fish, crustaceans). Diquat is particularly concerning, being 200 times more chronically toxic than glyphosate and banned in the EU. - Triclopyr and diquat have longer soil persistence (6 weeks and up to 15 years, respectively), increasing risks to non-target plants and ecosystems.Conclusion- Effectiveness: - Glyphosate-based Roundup is generally more effective for broad-spectrum, non-selective weed control, especially for deep-rooted perennials, due to its systemic action and ability to kill roots with fewer applications. - The new Roundup formula (Triclopyr, Fluazifop, Diquat) is equally or more effective in specific scenarios, such as controlling mixed populations of grasses and broadleaf weeds, woody plants, or poison ivy, and provides faster visible results due to diquat. However, it is less effective for larger or perennial weeds that require root kill, as diquat's contact action necessitates repeat applications. - For targeted applications (e.g., poison ivy, mixed grass/broadleaf weeds), the new formula may be preferable due to its tailored active ingredients. For general, non-selective weed control, glyphosate is typically more reliable.- Recommendation: - Choose glyphosate-based Roundup for broad-spectrum control of mixed weeds, especially perennials, in non-sensitive areas where soil persistence is not a concern. - Choose the new formula for specific weed types (e.g., woody plants, grasses) or when rapid visual results are desired, but be prepared for potential repeat applications and exercise caution around desirable plants due to triclopyr's soil persistence. - Always read and follow product labels for safe application, as the new formula has specific restrictions (e.g., no use in vegetable gardens, maximum application rates). - Consider non-chemical alternatives (e.g., hand weeding, flame weeding) or organic herbicides if health and environmental concerns are a priority."
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firebirdude
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Yesterday
6,775 Posts
I've used every Roundup product out there. Vinegar, salt, and lil soap works just as well. It really does.
2
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Frugal_Jerk
Yesterday
567 Posts
Quote
from firebirdude

[IMG]https://api-web.slickdeals.net/images/misc/backlink.gif[/IMG]


:


I've used every Roundup product out there. Vinegar, salt, and lil soap works just as well. It really does.





Don't the weeds grow back really quick? Traditional roundup has some kind of stuff that will keep the weeds down for three months or six months before they start growing again.I've used alternative weed killers before and they kill all the weeds . But then they start growing back immediately.Please Advise.
Yesterday
476 Posts
Joined Nov 2007
Yesterday
cmac2728
Yesterday
476 Posts
Quote from firebirdude :
I've used every Roundup product out there. Vinegar, salt, and lil soap works just as well. It really does.

Vinegar burns the foliage but does not translocate to the roots to kill the plants. I think vinegar is a good alternative to control weeds but does not offer the same effectiveness on controlling perennial vegetation.
Yesterday
476 Posts
Joined Nov 2007
Yesterday
cmac2728
Yesterday
476 Posts
I don't see how this product can be called a concentrate when the active ingredients are present at 1.5-2.5%. The product Remedy contains triclopyr at over 60%.
Yesterday
3,785 Posts
Joined Mar 2004
Yesterday
ghostwriter66
Yesterday
3,785 Posts
Quote from firebirdude :
I've used every Roundup product out there. Vinegar, salt, and lil soap works just as well. It really does.

Sorry — but Absolutely disagree — 1000% …
Yesterday
32 Posts
Joined Feb 2021
Yesterday
craving.pho
Yesterday
32 Posts
Quote from Frugal_Jerk :
Quote from firebirdude [IMG]https://api-web.slickdeals.net/images/misc/backlink.gif[/IMG] : I've used every Roundup product out there. Vinegar, salt, and lil soap works just as well. It really does. Don't the weeds grow back really quick? Traditional roundup has some kind of stuff that will keep the weeds down for three months or six months before they start growing again.I've used alternative weed killers before and they kill all the weeds . But then they start growing back immediately.Please Advise.
Yes, you'll probably have to reapply after a month or so. Vinegar is decent for spot treatments. Depending on your tolerance for artificial chemicals, I use concentrates like this Roundup. They're more effective, longer lasting, and cheaper.
Yesterday
808 Posts
Joined Sep 2016
Yesterday
frozenthorn
Yesterday
808 Posts
how many gallons can I make with the concentrate? home Depot has the $9.99 non concentrate gallons with wand ready to go. What's the dilution ratio for the concentrate?

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