Weed Warrior Weed & Grass Killer Concentrate Refill

Name: Weed Warrior Weed & Grass Killer Concentrate Refill
Brand: Sunday
SKU: SBA3306
Price: 22.00 USD
Availability: InStock
Rating: 4.3 (75 reviews)

$22

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

75 reviews

Organic

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.

Free shipping! Ships in 1-2 business days

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Your organic alternative, in a refill

Weed Warrior Concentrate Refill is a glyphosate-free organic weed and grass killer made from herbicidal soap. It strips the waxy coating off dandelions, crabgrass, chickweed, thistle, and plantain, with visible results in 20 minutes. Heads up, it kills grass too, so stick to driveways, patios, sidewalks, garden beds, and between pavers. For in-lawn weeds, grab Dandelion Doom.

What makes Weed Warrior Weed & Grass Killer Concentrate Refill different

Visible results in as little as 20 minutes
Glyphosate-free and OMRI-listed organic
Non-staining formula for patios and pavers
Works with your reusable Sunday sprayer
Works on 18+ weeds, moss, algae, and lichens

Ingredients

Herbicidal soap made from fatty acids. It breaks down the waxy outer layer on leaves, causing weeds to lose moisture and dry out rapidly.

How to use

Apply when temperatures are between 50 and 85 degrees F and no rain is expected for at least 3 hours.

Pour the concentrate into your reusable Sunday pouch.
Fill the pouch with water to the 1 gallon mark.
Shake the pouch well to mix.
Spray until leaves are entirely covered, top and bottom.
Repeat in 2 to 3 weeks for any regrowth.

FAQ

Will Weed Warrior kill my grass?

Weed Warrior Weed & Grass Killer Concentrate Refill is a non-selective herbicide, meaning it will kill any vegetation it contacts, including grass. Use Weed Warrior on driveways, patios, sidewalks, garden beds, and mulched areas.

For weeds growing in your lawn, use Dandelion Doom instead.

How fast does Weed Warrior work?

Weed Warrior Concentrate Refill delivers visible results in as little as 20 minutes. The herbicidal soap strips the waxy coating off leaves, causing weeds to dry out and brown on contact.

For tougher weeds with deep roots, repeat the application in 2 to 3 weeks.

What is the difference between Weed Warrior and Dandelion Doom?

Weed Warrior Concentrate Refill is non-selective, meaning it eliminates all vegetation on contact. Use it on patios, driveways, and garden beds. Dandelion Doom is selective and targets broadleaf weeds like dandelions and clover while leaving grass unharmed.

Is Weed Warrior a good alternative to Roundup?

Weed Warrior Concentrate Refill is a glyphosate-free, OMRI-listed organic weed and grass killer. It uses herbicidal soap from fatty acids instead of glyphosate. You can see weeds brown and wilt within 20 minutes of application, with no harsh chemicals.

Do I need the starter pack to use this refill?

Weed Warrior Concentrate Refill requires the Sunday reusable pouch and wand sprayer to apply. If you do not already have the sprayer system, pick up a [Herbicide Pouch + Sprayer](https://www.getsunday.com/shop/lawn-care/sunday-weed-killer-pouch-and-sprayer) or a Weed Warrior Starter Pack.

How long does Weed Warrior concentrate last?

Weed Warrior Concentrate Refill has a shelf life of approximately 2 years. After the initial mixing, shake the pouch well again if it sits for 30 or more days before the next use.

Documents

Weed Warrior Concentrate Label

Weed Warrior Concentrate Safety Data Sheet

Sunday Weed Warrior weed-and-grass killer starter pack on a black background, showing a teal concentrate bottle with a yellow cap, a refill concentrate pouch, and a spray wand with hose.

Learn more from The Shed

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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Rebecca

Verified Reviewer

LocationAL

It Works!

This weed killer has worked well for us. It's easy to use (but be careful to avoid the plants you want to keep) and it's more safe for our dog than the very toxic chemicals found in most weed treatments.

Sunday

Hello Rebecca! We're delighted to hear that our weed killer worked well for you. We look forward to helping you with any future gardening needs you may have. Thank you for choosing us!

Published date

06/27/26

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Connie H.

Verified Reviewer

LocationNE

Not a permanent kill

Weed warrior did kill the leaves of all the weeds and grass I sprayed within 3 hours just as advertised. However, within the week, the exact same weeds began growing right in the middle of the dead leaves! It seems the product does not kill the root permanently. These weeds were not large. Do I have...

Sunday

Thanks for sharing your experience. Weed Warrior works by burning back the top growth it contacts, but some weeds, especially perennial weeds, can regrow from roots or underground structures that weren't fully affected by the application. A follow up application may be needed for tougher weeds, but we'd love to help identify what's coming back. If you can share a photo of the weeds, our yard expert Sunny can take a closer look and recommend the best next steps. We’re here to help you get those weeds under control.

Published date

06/04/26

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M. K.

Verified Reviewer

Easy enough

I like the ease of application. Was a little nervous about the possibility animals might tread on it before it dried, so I applied it at sundown. A word to those who said it doesnt work, be sure to shake it well before you use it.

Published date

05/28/26

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Chris

Verified Reviewer

LocationVirginia

The solution for environmentally aware yards

Great product. We have a creek alongside our yard and don’t use herbicides unless absolutely necessary. Weed Warrior did an excellent job on a large lawn rehab, taking out tons of crabgrass and mock strawberry I had struggled with for years, so we can overseed with the Sunday shade mix. I went back ...

Published date

09/23/25

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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.

Sunday

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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