Weed Warrior Weed & Grass Killer Concentrate Refill
$22
22 oz. concentrate bottle Covers up to 224 sq. ft.
Organic





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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Organic





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.

Customer reviews
4.3
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
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
Was this review helpful?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!
Was this review helpful?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!
Was this review helpful?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!
Was this review helpful?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.
Was this review helpful?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.
Was this review helpful?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.
Was this review helpful?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.
Was this review helpful?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.
Was this review helpful?Great for dandelions
My experience is that it works great for dandelions but doesn’t do anything for other weeds.
Was this review helpful?
Questions & answers
38 questions
Question: Will the weed warrior hurt my hosta plants?
Sunday
Great question and smart to double check before spraying. Short answer: yes, Weed Warrior can hurt your hostas if it gets on them. Weed Warrior is a non selective herbicide, which means it doesn’t just target weeds, it will damage or kill any plant it touches, including grass and garden plants like hostas . If you’re using it near your hostas, here are a few safe use tips: -Apply on a calm day to avoid drift -Use a targeted spray and keep it low and close to weeds -Consider shielding nearby plants with cardboard or a barrier while spraying If you’re mainly dealing with weeds in your lawn, something like a more selective option can be a better fit so you’re not risking nearby plants. Either way, you’ve got options and we’re here to help you choose the right approach for your setup.
Question: I plan on spraying my lawn but I have a few fruit trees? Can I spray around them or within a certain radius of them?
Jeff McConathy
Great question! You can still apply near your fruit trees; we recommend avoiding spraying directly to your trees for best results.
Question: 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?
Jeff McConathy
Yes, you can re-enter the area as soon as the product dries!
Question: Will this kill poison ivy?
Louisa D.
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.
Question: I’m looking for a pet safe product to eradicate well established foxtails. Would this work on foxtails?
Jeff McConathy
Weed Warrior is effective on foxtail weeds! https://www.getsunday.com/shop/category/lawn-care/weed-killer

