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4.2 out of 5 stars. 739 reviews
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RM18 2.5 gal. Fast-Acting Grass and Weed Killer with Diquat

4.2

(739 Reviews)

|

Item # 126692499

$109.99

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Was$119.99

Save $10.00

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A woman outside with a dog

RM18 2.5 gal. Fast-Acting Grass and Weed Killer with Diquat

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RM18 2.5 gal. Fast-Acting Grass and Weed Killer with Diquat

Item # 126692499

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$109.99

$109.99

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$109.99

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Was$119.99

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Shopping at

Grassland (franklin) TN

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When you want fast results with minimal prep, the 2.5 gal. RM18 Fast-Acting Grass and Weed Killer with Diquat is your total solution for unwanted brush, grass and broadleaf weed control. Perfect for lawn replacement, clearing walkways, and leveling weeds along fence lines, buildings, and roadsides, this weed killer for grass kills the weeds while leaving fertile soil available for the plants you want-any product not absorbed by the plant will deactivate after it touches the ground. A combination of two herbicides, this weed preventer for lawns starts to kill weeds on contact, producing visible wilting within 12 hours. Kudzu, wild blackberry, poison ivy, poison oak, crabgrass, and dandelions (and over 100 other plants) are no match for this product, which is rainfast in thirty minutes and effective for up to 6 months. There are no entry restrictions to sprayed areas for pets or people after the spray has dried. Order a bottle of RM18 weed killer today.

For additional information on this product, please see the Product Documents section for all downloadable user manuals, installation guides, brochures and warranty statements.

  • Concentrated formula makes up to 106 gal. to provide unwanted brush, grass and broadleaf weed control
  • This weed and grass killer treats up to 31,800 sq. ft.
  • Produces visible results in as little as 12 hours
  • Kills the weeds and grasses down to the root while leaving fertile soil available for the plants you want
  • This weed preventer for lawns is made from a combination of two herbicides to start killing weeds on contact
  • Effective against Kudzu, wild blackberry, poison ivy, poison oak, crabgrass, and dandelions (and over 100 other plants)
  • Rainfast in thirty minutes and effective for up to 6 months
  • No entry restrictions to sprayed areas for pets or people after the spray has dried
  • Includes 2.5 gal. bottle of weed killer
  • For best results, apply this herbicide on a warm, sunny day when wind is calm and weeds are actively growing

Q&As

1 - 10 of 42 Questions

Q: what is the per gallon mix, is this a pre or post emergent weed killer

14 days ago
1 Answer
  • A: Howdy neighbor! The official mix rate for RM18 Fast-Acting Grass and Weed Killer is 6 fluid ounces (12 tablespoons) of concentrate per 1 gallon of water to treat 300 square feet, though you can use a lighter dose of 3 fluid ounces per gallon for small, easy-to-kill seedlings. This product is strictly a non-selective, post-emergent weed killer, meaning it will only destroy green weeds and grasses that are actively growing above the ground upon contact and contains zero pre-emergent properties to stop future seeds from sprouting.
    13 days ago
    Helpful?

Q: Will this harm hedges when used to spray weeds growing in them?

a month ago
1 Answer
  • AI-generated
    A: It depends on how the product is applied. While it is designed to kill weeds and grasses without harming tree root systems, it starts to kill on contact. To avoid harming hedges, ensure the spray does not touch their foliage, as any product not absorbed by the plant will deactivate after it touches the ground.
    a month ago
    Helpful?

Q: Will it kill trees if sprayed to close to the tree. Video shows a man spraying around a tree.

2 months ago
1 Answer
  • AI-generated
    A: No, this product is designed to kill weeds and grasses without harming the root systems of your trees. It deactivates once it touches the ground, leaving the soil fertile for the plants you want to keep. Additionally, you can safely plant new trees just one day after an application.
    2 months ago
    Helpful?

Q: After using this product, how long before you could plant seed for grass

5 months ago
1 Answer
  • A: You can plant grass seed 3 days after applying RM18 Fast-Acting Grass and Weed Killer.
    5 months ago
    Helpful?

Q: Can i spray around pond

9 months ago
2 Answers
  • A: Do not spray this product in the pond or close enough that the spray drift might reach the pond
    8 months ago
    Helpful?

Q: How soon can I plant after application

9 months ago
1 Answer
  • A: All ornamental flowers, trees and shrubs may be planted 1 day after application. Lawn grasses, herbs, vegetables, and fruits may be planted 3 days after application.
    9 months ago
    Helpful?

Q: Will this kill nut sedge and it’s rhizomes?

9 months ago
1 Answer
  • A: Hello, thank you for your question. It may kill nutsedge with multiple applications, but it is unlikely that it will kill its underground structures. You’ll need specialized sedge herbicides for reliable results.
    9 months ago
    Helpful?

Q: What is the mixture you have to use when mix it

11 months ago
1 Answer
  • A: Hello, thank you for your question. According to the user instructions: AMOUNT TO USE For best results: • Add 3-6 fl. oz. (12 TBS) per gallon of water (use the higher rate for larger weeds) • For easy to kill weeds such as small seedlings, add 3 fl. oz. (6 TBS) to 1 gallon of water However, the exact amount may vary depending on your specific application and the type of weeds you are treating. Always follow the product label instructions carefully for best results and safety.
    11 months ago
    Helpful?

Q: Can I use this to spray fence lines in horse pastures

a year ago
1 Answer
  • A: Yes. There are no entry restrictions to sprayed areas once the spray is dried.
    a year ago
    Helpful?

Q: Does this kill bahia grass?

a year ago
1 Answer
  • A: Hello, thank you for your question. Yes, it can kill bahia grass.
    a year ago
    Helpful?
1 - 10 of 42 Questions

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Reviews

Rating Snapshot

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482 reviews with 5 stars.
111 reviews with 4 stars.
49 reviews with 3 stars.
28 reviews with 2 stars.
69 reviews with 1 star.

Overall Rating

4.2
187 out of 233 (80%) reviewers recommend this product

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Summary of Reviews
AI-generated from customer reviews, which may include incentivized reviews.
The product is generally effective at killing weeds and grasses, with many customers reporting it works well and acts quickly. However, some found it may require multiple applications or higher concen...
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Most Helpful Favorable Review

Jan

5 years ago
I first bought this product and am happy to find out is works so much better than any of the weed & grass killers I have ever used.
6 people found this helpful
Show Reviews:

Most Helpful Critical Review

Waste of $$$$

6 years ago
i figured that this would be better to buy over Roundup but noooo! Mixed up 2 2.5 gallon tanks and double the passes and the weeds and grass are feeling great. Double the amount to water didn't have any better effect. Back to Roundup.
8 people found this helpful
Show Reviews:
  • weeds
  • results
  • grass
  • price
  • effect on weeds
  • spraying
  • purchase
  • killing
1 to 4 of 739 Reviews .
1 – 4 of 739 Reviews
Review 1

Weed and Grass Killer

19 days ago
Product works fine.
SweepstakesYes

Yes, I recommend this product.

Tucson AZ
Reviews 3

RM 18 works great!

a month ago
RM18 is the best weed killer. It has no smell and it kills weeds within a couple days.
SweepstakesYes

Yes, I recommend this product.

Reviews 18

Okay

a month ago
This stuff isn't really all that fast acting but it will kill most weeds..but not all.
SweepstakesYes

No, I do not recommend this product.

Review 1

Price & Quality

2 months ago
This is a good product, but I think that I will be using another kind of weed killer since the price of this has went up tremendously!!! I understand that prices go up but this is a bit much.