Weed Warrior Weed & Grass Killer Concentrate Refill

Name: Weed Warrior Weed & Grass Killer Concentrate Refill
Brand: Sunday
SKU: BWS1005
Price: 22.00 USD
Availability: InStock
Rating: 4.3 (71 reviews)

$22

27 oz. concentrate bottle Covers up to 224 sq. ft.

71 reviews

Weed Warrior weed control concentrate 27 oz

Weed Warrior Concentrate back of package image

Weed Warrior Weed & Grass Killer Concentrate Refill data sheet

Organic weed and grass killer concentrate refill

Fast-acting organic herbicidal soap refill for your existing Weed Warrior sprayer system. Kills vegetation on contact.

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Kill unwanted vegetation with less waste

Refill your Weed Warrior starter system for continuous weed & grass control.

This concentrated herbicidal soap formula is designed for your existing Sunday pouch and wand sprayer. Our fast-acting, non-selective concentrate kills stubborn populations of weeds, mosses, algae, and grasses quickly - with visible results in as little as 20 minutes. Perfect for use in garden beds, near patios, along sidewalks, in mulched areas, and other yards areas where complete vegetation control is needed.

PRODUCT FEATURES

Organic herbicidal soap concentrate refill
Kills all vegetation including weeds and grasses
OMRI-listed for organic gardening
See results in as little as 20 minutes
Non-staining formula
Non-selective - use carefully around desired plants
For use with Weed Warrior starter kits
Treats up to 224 sq. ft.

WHAT'S INCLUDED

27 oz. bottle of herbicidal soap concentrate. Designed as a refill for your existing Sunday Weed Warrior starter kits.

INSTRUCTIONS

For best results, apply between 50-85 degrees F when no rain is expected for 3+ hours:

Pour one full bottle of Weed Warrior into your reusable Sunday pouch and attach the sprayer
Use your outside hose to fill the pouch up to the 1-gallon mark
Secure the cap of the reusable pouch and shake well
Spray onto unwanted vegetation until leaves are entirely covered
Repeat treatment in 2-3 weeks for best results

Not for use in lawns

OMRI Organic Label

Helpful Tips from Lawn Advisors:

How does weed and grass killer work?

Weed Warrior is a powerful herbicidal soap made from fatty acids. It eats away at the waxy coating that protects most green leafy growth from the elements, causing rapid desiccation and plant death.

What vegetation does Weed Warrior control?

Effective against bluegrass, chickweed, crabgrass, corn spurry, dandelion, groundsel, lambsquarters, mouse-eared chickweed, mustards, plantain, redroot pigweed, round leaved mallow, sheep sorrel, shepherd's-purse, stinkweed, thistle, moss, algae, and lichens.

Do I need the Weed Warrior Starter Pack to use this product?

Yes, this is a refill concentrate only. You'll need the sprayer and pouch that come with the Weed Warrior Starter Pack or Starter 2-Pack to apply this product.

Can I use weed and grass killer on my lawn?

Weed Warrior is non-selective, meaning it will kill any vegetation it contacts - including grass. We recommend using it in gardens, sidewalks, mulch and other hardscapes rather than within your lawn. If you use Weed Warrior within your lawn, repair it with Sunday Grass Seed or Bare Repair (https://www.getsunday.com/shop/category/lawn-care/grass-seed).

How long does concentrate last?

Concentrates have a shelf life of approximately 2 years. After the initial mixing, mix well again if it sits for 30+ days.

Are there any US states where this is not approved for use?

This product is approved for use in all states.

Weed Warrior Concentrate Safety Information

Weed Warrior Concentrate Label

Weed Warrior Concentrate herbicide application to weeds in concrete

Weed Warrior Concentrate Instructions

Ready to kill weeds, grasses, and moss in just 20 minutes? Learn how to assemble your concentrate kit, how to apply it, and get best practices to control weeds in your yard.

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Customer reviews

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Fred

Verified Buyer

LocationGig Harbor, WA

Weed Warrior Recommendation

I've used Weed Warrior on my toughest weed (purple violet) and on persistent weeds that grow in the cracks of our driveway. Within hours, the weeds are dead and so is my grass (the label clearly states it will kill grass too). Patching the small amount of grass is worth it to get rid of the purple v...

Published date

08/03/21

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Jeremy

Verified Buyer

LocationLos Angeles

This stuff WORKS!

I love my Sunday weed warrior! I like that the weed killer works and doesn't kill my grass. Plus I don't have to worry about harmful chemicals and feel good letting my dog/neighbor kids run around on the grass after it's dry. Sunday fan for life!

Published date

07/14/21

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Erica

Verified Reviewer

LocationBoston, MA

Weed warrior kills weeds

I think this stuff works great. My weeds were awful this spring and I wish I tried this sooner. If it isn’t working for you, I think you might not be following the instructions. Make sure you’re shooting the leaves and not going for the roots. I think the sun also plays a role in the success. Th...

Published date

07/29/25

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William

LocationLongmont, Colorado

This stuff works FAST!

I don’t know what any of these people are talking about who say this stuff doesn’t work. I sprayed this on crab grass and weeds and everything. It’s all dead in less than 12 hours.

Published date

06/27/25

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Todd N.

LocationLittleton, Colorado

Great for dandelions

My experience is that it works great for dandelions but doesn’t do anything for other weeds.

Published date

05/18/25

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Rachel

Did nothing

I went through 2 containers across various spots of my yard, on all kinds of different weeds, and nothing happened.

Store Owner

Hi Rachel, we're sorry to hear that this was your experience! Our team would love to take a look at your weeds and make sure Weed Warrior is the right option to treat them. You can reach them at [email protected] or by calling 415-903-6932.

Published date

05/13/25

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Scott w.

Verified Reviewer

LocationWarwick ri

So much crab grass

Weed warrior did nothing for me. I have so much crabgrass. I have never had this much. Will not be renewing Sunday this had not been a good experience.

Store Owner

We're sorry to hear that your weed control results aren't as expected! Here are some Best Practices to follow for best results. 1.) Try to apply on a sunny day. While not mandatory, sunshine will improve the efficacy and speed of our herbicides. With sunshine unfiltered by clouds, our herbicides will work even better. A rainfall within 3 hours after application can make the herbicides ineffective. Optimal temperatures for application are between 50F to 85F. 2.) Apply when the weeds look healthy. When weeds are stressed or injured, weeds release hormones to recover. These hormones make herbicides less effective. Hormones are also released if weeds are mowed; we recommend not applying on the same day you mow. 3.) Apply the leaves liberally. Our herbicides just need to make contact with the leaves to work; trying to apply to the roots won't be effective. For best results, you want the leaves soaked, but not to the point where the herbicides is dripping off the leaves. 4.) Know the age of the weed. Older and established weeds will likely require more applications. For older weeds, we recommend doing multiple applications on the same day; just let the leaves dry out in-between applications.

Published date

07/27/24

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Jenn

Verified Reviewer

LocationFremont, Wi

Amazing

The 2024 spring season in Wisconsin met us with a lot of rain. Between juggling work/ family/ animal needs we just could not stay on top of the weeds in our many flower beds. We have dogs, chickens, outdoor koi and two bee hives on our land- so having something "safer" was necessary. We tried the da...

Published date

06/07/24

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Bastul

Verified Reviewer

LocationTulsa, Oklahoma

No impact at all

Sprayed this product on weeds and no impact. My initial thought was rains the next day impacted the application so used a second round on a hot day with no rain. Again, absolutely no impact on any of the weeds sprayed. Very dissatisfied with this product.

Store Owner

Published date

05/22/24

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Neeci

Verified Reviewer

LocationSearcy, AR

Bye bye grass in flowerbeds

So the new flowerbed had some Bermuda grass coming up through the weed guard paper, not any more. I watched it get wilty within 30 minutes when I went to check on it. I pulled the dead grass the next morning. Other weeds I hit in the flowerbed where much easier to pull then weeds I didn’t hit with w...

Published date

05/11/24

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