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🌱 Fast, fierce, and flawless weed control—because your lawn deserves the best.
RM18 Fast-Acting Weed & Grass Killer is a powerful 1-gallon herbicide concentrate that treats up to 12,600 sq ft with visible results in just 12 hours. Trusted by thousands, it transforms weed control into a quick, efficient task, making it ideal for large lawns and professional use.









| ASIN | B07BB8G44B |
| Active Ingredients | Herbicide |
| Best Sellers Rank | #10,821 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #98 in Weed Killers |
| Brand | RM18 |
| Brand Name | RM18 |
| Coverage | 12600 Square feet |
| Customer Reviews | 4.4 out of 5 stars 1,927 Reviews |
| Included Components | RM18 Fast-Acting Weed & Grass Killer Herbicide, Spray, 1-gallon |
| Item Form | Spray |
| Item Type Name | RM18 Fast-Acting Weed & Grass Killer Herbicide, Spray, 1-gallon |
| Item Weight | 9.3 Pounds |
| Liquid Volume | 1 Gallons |
| Manufacturer | Ragan & Massey, Inc. |
| Model Number | 75436 |
| Part Number | 75436 |
| UPC | 737716754360 |
| Unit Count | 128.0 Fluid Ounces |
| Warranty Description | Warranty |
L**Y
It works, just keep dry and give time
Good this product first at local store in small container. It worked very well on south Florida stubborn weeds on rock beds, between travertine pool deck and paver driveway. I am glad Amazon had a bigger container for a fair price. After application try to keep area dry for 3 days and you will see the results. I have to re-apply maybe monthly or bi monthly.
F**E
NOT FAST BUT WORKS
It took 3 days to see the wilting and yellowing. After some warmer temperatures and sun it did work.
T**.
RM18
Works as well as rm43. Kills grass and weeds...don't waste your money on other weed killers....
J**P
Use at full strength and it's amazing
EDITED VERSION: This edited version is long overdue. I decided to give it another try, this time i added a surfactant and used it at full strength (maybe even an ounce more than recommended) making sure i drenched the foliage. worked great on the lawn (where i wanted to place a garden) and literally the next day the grass and weeds were brown... dug all that up, and was able to plant in a couple days. DID NOT work on the more invasive plants (blackberry, bittersweet, and bamboo). would highly recommend for regular weeds as i've never seen anything work so fast. do not recommend it for brush/vines... PREVIOUS VERSION: I have been a fan of the Ragan & Massey product line for a while so i was very excited to try a new product by them... especially a "fast acting" herbicide with the name of this company behind it. I followed the instructions (even prepared the mixture on the stronger side, as recommended for the type of plants and infestation i was dealing with, coupled with a surfactant), sprayed in the late morning on a sunny afternoon, drenched the weeds and ivy, and went outside the next day anticipating drastic results. I was very disappointed. It's been about a week now, and i've noticed some wilting (some were even clearly dead) on some of the weeds (like dandelions and other common grass-type weeds) but as far as the thorny brush and ivy, i noticed marginal wilting on some of the plant... the rest of it looked like i had used fertilizer on it, growing like crazy. I was hoping this was going to be the answer to the overgrown bamboo, bittersweet, blackberry, and rose bush problem i have all over the property. I know the RM43 worked wonders, but it took weeks for it to kick in and i was very excited to try something that wouldn't inhibit or prevent growth for an entire year and i could replant immediately. My advice is go with compare and save herbicide. it works pretty well, and you can replant a few weeks later. this stuff seems pretty worthless. i'm going to try at a higher concentrate and will update with any changes, but still... this product did not deliver like i was expecting it to from this company.
D**7
Works Great
i live in the country and grow hay on my property . Mixing is easy and Spraying this on the fence lines around my house works wonders. within a few days everything is dead within a few weeks it’s gone and disintegrating. Worth the price.
N**T
Weeds
Can kills the weeds real good. Just like magic
U**L
Great stuff
Highly recommend
D**D
Haha nice try
Bought this stuff hoping it would be better than roundup.. nope this is junk also. Used at full dose. I can tell the small stuff don’t like it but nobody is going anywhere. lol it’s been 4 days.
Trustpilot
2 months ago
5 days ago