Sunday Lawn & Garden Care

Weed Warrior Weed & Grass Killer Concentrate Refill

$22

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

Organic

Sunday Weed Warrior organic weed and grass killer 22 oz concentrate refill bottleWeed Warrior Concentrate back of package imageWeed Warrior Weed & Grass Killer Concentrate Refill data sheetWeed Warrior Weed & Grass Killer Concentrate Refill data sheetWeed 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.

$22

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Organic

Sunday Weed Warrior organic weed and grass killer 22 oz concentrate refill bottleWeed Warrior Concentrate back of package imageWeed Warrior Weed & Grass Killer Concentrate Refill data sheetWeed Warrior Weed & Grass Killer Concentrate Refill data sheetWeed Warrior Weed & Grass Killer Concentrate Refill data sheet

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.

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

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.

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.

Customer reviews

4.3

starstarstarstarstar

Based on 76 reviews

Customers say

AI-generated from customer reviews.

Weed Warrior Herbicide Concentrate Refill is highly effective at killing weeds without harming grass, making it a popular choice among customers.

Reviews with media

Popular topics

76 reviews

  • Fred

    Verified Buyer

    LocationGig Harbor, WA

    starstarstarstarstar

    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 violet! I highly recommend Weed Warrior for your weed control. Fred

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  • Jeremy

    Verified Buyer

    LocationLos Angeles

    starstarstarstarstar

    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!

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  • Daniel M.

    Verified Reviewer

    LocationMontana

    starstarstarstarstar

    Sprayer handle is junk

    I’ve ordered the two pack twice. While the weed killer works Awsome. All 4 sprayer handles did not work. I only got one to kinda work the other 3 didn’t pump one ounce. I had to constantly shake the bag to get one to work They are absolute garbage.

    Sunday

    We're really sorry you got stuck with four broken sprayers when our weed killer is actually doing its job—that's inexcusable, especially when you've given us a second chance. We need to fix this for you with working sprayers or our pro sprayer so you can finally use the product that's actually working and get results without the frustration. Happy to help get another option in your hands!

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  • Rebecca

    Verified Reviewer

    LocationAL

    starstarstarstarstar

    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!

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  • Connie H.

    Verified Reviewer

    LocationNE

    starstarstarstarstar

    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 to keep applying in order to kill the root? If so, I would need to purchase quite a bit more!!

    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.

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  • M. K.

    Verified Reviewer

    starstarstarstarstar

    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.

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  • Chris

    Verified Reviewer

    LocationVirginia

    starstarstarstarstar

    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 a second time where I had missed places, but it was still simple.

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  • Erica

    Verified Reviewer

    LocationBoston, MA

    starstarstarstarstar

    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. The only thing I don’t love is the smell. I sprayed 12 hours ago and my backyard still stinks.

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  • William

    Verified Reviewer

    LocationLongmont, Colorado

    starstarstarstarstar

    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.

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  • Todd N.

    Verified Reviewer

    LocationLittleton, Colorado

    starstarstarstarstar

    Great for dandelions

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

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$22