Weed Warrior Weed & Grass Killer Concentrate Refill

Name: Weed Warrior Weed & Grass Killer Concentrate Refill
Rating: 4.3 (70 reviews)

$22

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

70 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.

Free shipping! Ships in 1-2 business days

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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.

Read article

Customer reviews

4.3

70 Reviews, 36 Q&As

4.3

70 Reviews, 36 Q&As

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70 Reviews

Updating Results

07/13/25

Fred

08/03/21

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 w...Read More

eed control.

Fred Read Less

Location:

Gig Harbor, WA

Image of Review by Fred on 3 Aug 2021 number 1

Jeremy

07/14/21

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!

Location:

Los Angeles

Image of Review by Jeremy on 14 Jul 2021 number 1

William

06/27/25

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.

Location:

Longmont, Colorado

Jenn

06/07/24

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 dawn/ salt/ vinegar method, and seemed to get stron...Read More

ger weeds. We ordered weed warrior and after just one application we are so pleased. Now, I sprayed around 7 in the evening when it was about 70 degrees outside. Ideally the warmer weather and sun is recommended. At 7, most of the honey bees are in the hive for the evening and our dogs/ chickens could also be removed from the outside. About an hour after applying we could see some weeds looking a bit brown/ dark purple. In the morning it was very visible where we sprayed and could see the weeds looking unhealthy. After the sun came out for the day and about 24 hours after the first spray weeds were brown, dried up and dead/dying. A few weeds that have pokers on them I will respray before I pull them (for good measure) but overall the weeds are dead. If the product works this well when applied in less than ideal conditions I can't wait to see how they respond when applied in full sun and warmer temps. The sprayer bag is super easy to fill, use and no pumping of the sprayer. A lot of thought clearly went into this product. I give it five stars and Sunday, you have a client for life. Read Less

Location:

Fremont, Wi

Neeci

05/11/24

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 weed warrior. It worked better and faster than any...Read More

other previous weed killers I have used. Now my flowerbeds can stay grass and weed free. Now to see what happens to the yard over the year. Read Less

Location:

Searcy, AR

04/15/24

This product should be renamed!

It's called Weed Warrior. It should be called Vegetation Killer! It kills everything! I asked the support will it kill my grass too? "Our herbicide killer is specifically designed to target unwanted grass with direct application. Rest assured, it is highly unlikely to harm your existing grass." Not so much..

Location:

Indianapolis, IN

Richard

08/24/21

It works

Location:

Virginia

Tony

08/20/21

Weed killer

Excellent it really works in minutes!!

Location:

Sugar grove il

Richard

08/20/21

I was totally amazed at

I was totally amazed at how fast the results revealed how it works. Sprayed at noon and by 4 pm it was obvious to me the weeds were done.
Sunday said it was quick - it was faster than that!

Dan

08/19/21

Well, it's August, the month

Well, it's August, the month I was waiting for to really put Sunday to the test. By now, the lawn is usually withered and full of crab grass. Thanks to the great instruction AND the very effective products. I'm in the green in August for the first time in 20 years!

Location:

Charlotte, NC

Kathy Q.

08/19/21

We used this in various

We used this in various parts of the driveway and sidewalk. It did its job!

Location:

North Brunswick, NJ

Kathryn

08/19/21

Kills weed quickly without damaging

Kills weed quickly without damaging the grass or flowers. Very pleased with the results.

Location:

Boston MA

Amber O.

08/03/21

Fit for purpose

I have a gravel driveway that was swimming in weeds. I tried vinegar on them, but it made only a tiny dent in the problem. This works so much better. In combination with a Dutch hoe, the driveway is finally clear.

Don’t expect Roundup like results, but I’m trying to stay away from that stuff. Also like that the soap doesn’t have long ter...Read More

m effects on the soil like the salts you see in other homemade or eco friendly recipes. Read Less

Location:

Kent, CT

Dave

08/03/21

Works great and can see

Works great and can see results in a matter of Hours.

Location:

Southern Pines, NC

Valerie

07/14/21

Does kill the weeds but

Does kill the weeds but be careful it doesn’t discriminate between your grass and weeds. I spot treated and then pulled up weeds. Since using Sunday my lawn has improved. It still has a long way to go and that’s because it was never taken care of. Sunday makes lawn care easy. I stood in Lowe’s for hours trying to figure out what to put on my lawn....Read More

Sunday took all that guess work away and probably saved me $100s. Read Less

Location:

Tampa Florida

Wade W.

07/13/21

Awesome weed killer

This stuff works and fast!

Location:

Jacksonville, FL

Regis

07/06/21

Blasted the dandelions and weeds,

Blasted the dandelions and weeds, killed on contact!

Reseeded parts of my lawn and sprayed my strong grass. I am the talk of my neighborhood, they love the lush green grass

Glenda

06/30/21

Grass looks nice and green

Tish

06/25/21

Great product

Our lawn has never looked better! This weed killer works and it's natural, which makes me feel good about using it. Will definitely repurchase again.

Location:

New Braunfels Texas

Amy

06/23/21

Highly effective on weeds!

Location:

Portland, OR

Ana R.

06/22/21

Kills weed well

Location:

Kansas

David F.

06/22/21

Definitely have a healthier lawn

Definitely have a healthier lawn this year and the only change I made was using Sunday products. Will definitely keep using.

Location:

Bloomington IN

Gary C.

06/15/21

While the weeds go away

While the weeds go away slower than other like products, I fully appreciate that it is environmentally friendly.

Location:

Kure Beach, NC

Jennifer

06/08/21

Love this product! Just spray

Love this product! Just spray it on and the weeds are gone!

Location:

Fairport, NY

Weslee H.

04/30/21

This worked as advertised. Love

This worked as advertised. Love that it’s not using harsh chemicals too. I have kids that love to play outside and wrestle and flip all over the yard so it’s nice knowing they can do so in a safe environment instead of among a ton of chemicals.

Location:

Caifornia

Sheri

07/09/25

Q: I'm looking to eradicate weeds that have grown in my sand volleyball court. Once the spray has dried and we've removed the dead weeds, will the sand be safe to play in?

Store Owner

07/10/25

A: Yes, you can re-enter the area as soon as the product dries!

Tyler

06/29/25

Q: I’m looking for a pet safe product to eradicate well established foxtails. Would this work on foxtails?

Store Owner

06/30/25

A: Weed Warrior is effective on foxtail weeds! getsunday.com/shop/category/lawn-care/weed-killer

Kim

04/20/25

Q: If sprayed around dirt portion of trees, will it kill the tree?

Store Owner

04/21/25

A: Weed Warrior is an effective weed control when sprayed directly on plants. If you avoid spraying directly to any plants that you wish to keep, you will not kill them.

James

04/18/25

Q: How long before animals can go back outside after spraying this product?

Store Owner

04/18/25

A: Great question! We designed Sunday with safety in mind, so we are extremely selective about not only the ingredients we use but also the lawn and garden techniques we recommend. Our ingredients break down quickly and don’t persist in the environment. After our products dry, you can get back to playing outside right away.

03/23/25

Q: Is this effective on burr buttercup?

Store Owner

03/24/25

A: Yes, Weed Warrior should help with this weed!

Ralph T.

03/18/25

Q: I have a purple deadnettle all over my lawn? (Virginia - Hampton Roads)

Store Owner

03/18/25

A: Weed Warrior should be effective on your dead-nettle!

Linda M.

03/03/25

Q: The first shipment of Weed warrior worked so well and the weeds were dying almost immediately. The shipment I received last week didn’t work at all. Did you change the formula or is the lot bad?

Store Owner

03/03/25

A: We have not changed our Weed Warrior formula. We recommend reaching out to our support team for further assistance. You can reach them at [email protected] or by calling 415-903-6932.

Abilash

08/30/24

Q: How soon can I reseed after applying weed warrior herbicide?

09/03/24

A: We recommend waiting 5 days after applying Weed Warrior to seed.

Anjeli

08/24/24

Q: Does the weed killer harm bees? We have two hives and want to make sure they are t harmed in the process.

08/26/24

A: We understand that pollinators are one of the cornerstones of our planet's ecosystem, and keeping them healthy and happy is crucial. When used as directed, our lawn nutrient products are wildlife and pollinator-friendly!

Pollinator Safety Guidance:
- Always read the entire label/instructions, follow instructions precisely, and adhere to pollinator safety guidance provided.
- When applying our fertilizers, be sure to spray on turfgrass only and avoid flowerbeds and gardens.
- Remove or mow flowering weeds before spraying with any Sunday products.
- Be sure to apply weed control and pest control products when most pollinators are least active (early morning/sunset are best).

Juan

08/19/24

Q: Can I use this with my own sprayer. I would like to buy the concentrate and mix it for my own large sprayer.

08/21/24

A: Yes, our concentrate is designed to be mixed with one gallon of water per bottle of concentrate.

Carole

08/03/24

Q: Does this kill Creeping Charlie?

08/06/24

A: Yes, Weed Warrior is effective on Creeping Charlie. Take care when spraying near plants or grass that you wish to keep, because it will kill healthy grass and plants.

Alexis

06/28/24

Q: I'm planning a new garden bed in an area that's currently covered with grass. If I use Weed Warrior to kill the grass (so it's easier to create the bed), will it affect the soil in my new bed? Thanks!

06/28/24

A: Great question! We recommend waiting 5 days after applying Weed Warrior before planting in that same area.

Rachel

06/26/24

Q: My dog likes to eat grass and weeds when she gets excited and it’s nearly impossible to stop her. I realize that this is somewhat pet safe due to it drying but is it safe for dogs to actually consume when it’s dry?

06/26/24

A: When using Sunday in an area where animals will be grazing, we recommend the following: 1. Apply Sunday only as directed according to your instructions and labels. 2. Wait 24 hours and then water the entire grass area with 1/2" of water, or wait until a rain before allowing animals back onto the grazing area.

Haley

06/20/24

Q: I’m hoping to spray a large area of our unmanaged front yard with this. Once the weeds die and we pull them all up, can we then replant flowers in the same place we sprayed? Is there a wait time to do this or anything we need to do after spraying and before replanting?

06/20/24

A: We recommend waiting at least 5 days after spraying Weed Warrior before planting any flowers, vegetables, or grass.

Dog l.

06/19/24

Q: Is this pet friendly?

06/20/24

Leslie

06/13/24

Q: Does this work on weeds in the shade?

06/13/24

A: Sunshine does help our weed control work, but you can most definitely use it effectively in the shade!

Sarah

06/08/24

Q: Does this kill Canadian thistle and Bind weed?? It mentions thistle, not sure if there are more than 1 stubborn kinds.

06/10/24

A: Weed Warrior is effective on both Bindweed and Canadian Thistle.

Becky

06/06/24

Q: Is this safe to use in a vegetable garden? Will it kill the plants?

06/10/24

A: Weed Warrior is a non-selective herbicide which means that it will likely kill most plants that it is sprayed on. We recommend taking extreme care when spraying near desired plants to avoid any over spray.

Stephanie

05/28/24

Q: We are desperate for an all natural effective spray against blackberry bushes/ briars. Do you have anything in the works for that?

05/29/24

A: Unfortunately, we don’t offer a weed control product effective on blackberries. But, our team is always working on new products with ingredients that meet our standards, so stay tuned! If you're interested in connecting with a Yard Advisor regarding your weeds, you can always reach them here: https://www.getsunday.com/help-center?a=Contact-Customer-Service---id--QtSDAj-sRAulw9HUjz4osg

Jan

05/22/24

Q: Will Weed Warrior kill ivy?

05/26/24

A: Weed Warrior may help to control ivy, but ivy is not on the list of weeds that can be eradicated by Weed Warrior.

Taylor

05/20/24

Q: Can this product be used around raised garden beds that are used to grow some vegetables? The boxes are cedar, about 2 feet high and filled with soil. The area surrounding our boxes are currently overgrown with weeds

05/21/24

A: Weed Warrior is designed to kill the weeds that it is directly applied to, so it should not affect weeds in nearby garden beds. We always recommend taking caution to spray only on the weeds that you want to kill.

John

05/13/24

Q: Will this kill poison ivy?

05/14/24

A: Poison ivy is not on the list of weeds addressed by Weed Warrior. It may help to control poison ivy, but likely won't completely eradicate it.

Alex

05/09/24

Q: Will this kill clover?

05/10/24

A: Yes, Weed Warrior is effective on clover!

Glen

05/08/24

Q: I do not see any instructions for applying with pets in the area. Are there no precautions needed for a dog in the yard?

05/08/24

A: We designed Sunday with safety in mind, so we are extremely selective about not only the ingredients we use but also the lawn and garden techniques we recommend. Our ingredients break down quickly and don’t persist in the environment. After our products dry, you can get back to playing outside right away.

Sarah T.

05/04/24

Q: Will this kill bushes in a mulch bed?

05/06/24

A: Our weed control options should work well on most weeds, unless they are woody, are several years old, or have modified stems (like bulbs, tubers, rhizomes, etc.), so we don't typically recommend it to be used on shrubs or bushes.