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4.5
(309)
4.5 out of 5 stars. 309 reviews
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Shop all Roundup

Roundup 36.8 oz. Plus Weed and Grass Killer Concentrate

4.5

(309 Reviews)

|

Item # 4220018

$36.99
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  9. Roundup 36.8 oz. Plus Weed and Grass Killer Concentrate

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  4. Grass & Weed Killers

Roundup 36.8 oz. Plus Weed and Grass Killer Concentrate

Shop all Roundup
Roundup 36.8 oz. Plus Weed and Grass Killer Concentrate

Item # 4220018

Image showing Roundup Roundup 36.8 oz. Plus Weed and Grass Killer Concentrate
Image showing Roundup Roundup 36.8 oz. Plus Weed and Grass Killer Concentrate
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Shop all Roundup
Roundup 36.8 oz. Plus Weed and Grass Killer Concentrate

Item # 4220018

Image showing Roundup Roundup 36.8 oz. Plus Weed and Grass Killer Concentrate
Image showing Roundup Roundup 36.8 oz. Plus Weed and Grass Killer Concentrate
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Great value for larger areas. Roundup brand products help you triumph over the toughest weeds and Roundup 36.8 oz. Plus Weed and Grass Killer Concentrate now features an easy-measure cap that helps to make using concentrates easy to use. Roundup Concentrate Plus Weed and Grass Killer is perfect for use around shrubs and trees, on patios, walkways, driveways, gravel areas and mulch, and along fences and foundations. DO NOT USE for spot weed treatment after planting any fruits or vegetables. It is also ideal for large jobs including lawn replacements or garden plot preparation. For best results, add 6 fl. oz. of weed killer concentrate to 1 gal. of water. Use of a Roundup brand sprayer is recommended. The formula is rainproof in 30 minutes, and with FastAct Technology, you will see visible results in as fast as 9 hours. Kill the toughest weeds and grasses to the root with Roundup Concentrate Plus Weed & Grass Killer.

  • Roundup kills tough weeds and grasses to the root
  • Rainproof in 30 minutes
  • FastAct Technology - visible results in as fast as 9 hours
  • Use this weed killer around flowers, shrubs, and trees; on patios, walkways, driveways, gravel areas, and mulch beds; along fences and foundations; in large areas for lawn replacements or garden plot preparation
  • Apply with a Roundup brand tank sprayer
  • Includes 36.8 oz. of weed and grass killer concentrate
  • Easy-measure cap helps to make using concentrates easy to use
  • Great value - makes 5 gal. of spray solution from 16 oz. concentrate bottle, and covers up to 800 sq. ft.
  • People and pets must not touch treated plants or enter treated areas until after spray has dried
BrandRoundup
Country of OriginMade in USA
Active IngredientsGlyphosate 18%, Diquat 0.73%
Application MethodSpray bottle
Compatible SeasonsSpring/Summer/Fall
Concentrated or Ready to UseConcentrated
Contact Or SystemicContact
Coverage Area10 gal.
EmergencePost-Emergent
Fertilizer Coverage Area Range0 - 2000 sq ft
FormLiquid
Package Quantity1
Package Size36.8 oz.
Product Height4.75 in.
Product Weight36.8 oz.
Product Width2.43 in.
WarningsDo not use for spot weed treatment after planting any fruits or vegetables
Weed Killer FeaturesPet/Livestock Friendly
Manufacturer Part Number5100612

Have a question?
Start typing your question and we'll check if it was already asked and answered.
1 - 8 of 8 Questions
Sort by
Newest questions

Q: Can this be used around pigs? I have an inside pig that goes outside and grazes and my fence needs sprayed but wanna make sure it would be safe for my pig to go back in the yard after it dries.

2 years ago
2 Answers
  • Roundup Consumer Services
    A: Hello! Thanks for your question. Roundup Weed & Grass Killer Concentrate Plus is not registered or labeled for use in areas where grazers are kept, even temporarily. Because the products are not labeled or registered for use in a pasture area or other area where grazers may be allowed, we must recommend keeping grazers out of the application area for 1 year.
    10 months ago
    Helpful?

Q: Will roundup kill corn if I plant it 3 days after I use it

2 years ago
2 Answers
  • Roundup Consumer Services
    A: Hello! Thanks for your question. Roundup Weed & Grass Killer Concentrate Plus can be used for garden preparation. All vegetables and fruits may be planted 3 days after application. This product cannot be used around already planted edibles.
    10 months ago
    Helpful?

Q: What's the recommended mix ratio for a 15 gallon sprayer

3 years ago
2 Answers
  • Roundup Consumer Services
    A: Hello! Thanks for your question. The dilution rate for Roundup Weed & Grass Killer Concentrate Plus is as follows: Annual Weeds: Use 3 oz per gal of water (3oz = 6 tablespoons or 18 teaspoons). Perennial, hard-to-control, or brushy weeds: Use 6 oz per gal of water (6oz = 12 tablespoons or 36 teaspoons). If you are uncertain whether you have an annual or perennial weed, use the highest dilution rate. Application at concentrations above label rate will not give better results, as plants can absorb a limited amount of glyphosate.
    10 months ago
    Helpful?

Q: How do I remove the lid

4 years ago
1 Answer
  • A: The lid should twist off. Please refer to the bottle for lid removal instructions.
    4 years ago
    Helpful?

Q: How long after application can you plant grass?

4 years ago
1 Answer
  • A: If you're thinking about applying Roundup® For Lawns to a newly seeded area, you should wait until your new grass is not so new—approximately six weeks after seedling emergence or after the third mowing is a good rule of thumb.
    4 years ago
    Helpful?

Q: How long after use can you plant a food plot ?

5 years ago
1 Answer
  • A: For assistance with this inquiry you would need to contact the manufacture directly.
    5 years ago
    Helpful?

Q: how much of a area will the 36.8oz of concentrate do??

7 years ago
1 Answer
  • A: Thank you for inquiring about Roundup Weed & Grass Killer Concentrate Plus. For normal weeds this container will cover 3600 sq ft mixed at 3 oz per gallon of water. For hard to kill weeds it will cover 1830 sq ft mixed at 6 oz per gallon. You can contact us if you need further assistance. We can be reached at http://tinyurl.com/mx3ua3u.
    7 years ago
    Helpful?

Q: How much do you use per Gallon of water?

7 years ago
1 Answer
  • A: We appreciate your interest in Roundup Weed & Grass Killer Concentrate Plus. For annual Weedsyou will need to use 3 oz per gal of water. For perennial, hard-to-control, or brushy weeds it will require 6 oz per gal of water. You can contact us if you need further assistance. We can be reached at http://tinyurl.com/mx3ua3u.
    7 years ago
    Helpful?

Q&As

Have a question?
Start typing your question and we'll check if it was already asked and answered.
1 - 8 of 8 Questions
Sort by
Newest questions

Q: Can this be used around pigs? I have an inside pig that goes outside and grazes and my fence needs sprayed but wanna make sure it would be safe for my pig to go back in the yard after it dries.

2 years ago
2 Answers
  • Roundup Consumer Services
    A: Hello! Thanks for your question. Roundup Weed & Grass Killer Concentrate Plus is not registered or labeled for use in areas where grazers are kept, even temporarily. Because the products are not labeled or registered for use in a pasture area or other area where grazers may be allowed, we must recommend keeping grazers out of the application area for 1 year.
    10 months ago
    Helpful?

Q: Will roundup kill corn if I plant it 3 days after I use it

2 years ago
2 Answers
  • Roundup Consumer Services
    A: Hello! Thanks for your question. Roundup Weed & Grass Killer Concentrate Plus can be used for garden preparation. All vegetables and fruits may be planted 3 days after application. This product cannot be used around already planted edibles.
    10 months ago
    Helpful?

Q: What's the recommended mix ratio for a 15 gallon sprayer

3 years ago
2 Answers
  • Roundup Consumer Services
    A: Hello! Thanks for your question. The dilution rate for Roundup Weed & Grass Killer Concentrate Plus is as follows: Annual Weeds: Use 3 oz per gal of water (3oz = 6 tablespoons or 18 teaspoons). Perennial, hard-to-control, or brushy weeds: Use 6 oz per gal of water (6oz = 12 tablespoons or 36 teaspoons). If you are uncertain whether you have an annual or perennial weed, use the highest dilution rate. Application at concentrations above label rate will not give better results, as plants can absorb a limited amount of glyphosate.
    10 months ago
    Helpful?

Q: How do I remove the lid

4 years ago
1 Answer
  • A: The lid should twist off. Please refer to the bottle for lid removal instructions.
    4 years ago
    Helpful?

Q: How long after application can you plant grass?

4 years ago
1 Answer
  • A: If you're thinking about applying Roundup® For Lawns to a newly seeded area, you should wait until your new grass is not so new—approximately six weeks after seedling emergence or after the third mowing is a good rule of thumb.
    4 years ago
    Helpful?

Q: How long after use can you plant a food plot ?

5 years ago
1 Answer
  • A: For assistance with this inquiry you would need to contact the manufacture directly.
    5 years ago
    Helpful?

Q: how much of a area will the 36.8oz of concentrate do??

7 years ago
1 Answer
  • A: Thank you for inquiring about Roundup Weed & Grass Killer Concentrate Plus. For normal weeds this container will cover 3600 sq ft mixed at 3 oz per gallon of water. For hard to kill weeds it will cover 1830 sq ft mixed at 6 oz per gallon. You can contact us if you need further assistance. We can be reached at http://tinyurl.com/mx3ua3u.
    7 years ago
    Helpful?

Q: How much do you use per Gallon of water?

7 years ago
1 Answer
  • A: We appreciate your interest in Roundup Weed & Grass Killer Concentrate Plus. For annual Weedsyou will need to use 3 oz per gal of water. For perennial, hard-to-control, or brushy weeds it will require 6 oz per gal of water. You can contact us if you need further assistance. We can be reached at http://tinyurl.com/mx3ua3u.
    7 years ago
    Helpful?

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Overall Rating

4.5
224 out of 251 (89%) reviewers recommend this product

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  • weeds
  • spraying
  • grass
  • instructions
  • purchase
  • results
  • price
  • functional
1 to 4 of 309 Reviews .
1 – 4 of 309 Reviews
Sort by
Most Recent
Review 1
1 out of 5 stars.

Generic brand worked Better

a year ago
Didn't work better than the cheap brands Paid more got Less
Response from Roundup Consumer Services:
a year ago
Roundup Consumer Services
Hi, we're sorry to read about your disappointment with Roundup Weed & Grass Killer Plus and appreciate your feedback.

A complete kill will take 4 weeks. Apply when daytime temperatures are consistently between 60 - 85 degrees F. We recommend to water the area 24hrs prior to applying Roundup or apply a day or two after it has rained for best results. It's best to apply in morning after dew has evaporated. We recommend that weeds not be cut for two days both before and after the product application to maximize leaf surface and absorption.

We want you to be confident in our products. For this reason, we offer a product guarantee. If for any reason you, the consumer, are not satisfied with the results after using this product, you are entitled to get your money back. Limitations apply. At your earliest convenience, please reach out to us at 866-324-2647 if we can further assist. roundup
Chellester
Review 1
Age45 to 54
GenderFemale
5 out of 5 stars.

Kills Weeds Dead

2 years ago
I am so happy to have found a weed killer that works on all my pesky weeds. I have tried several brands over the years, and nothing works better for me than Roundup Weed & Grass Killer Concentrate Plus. I use it all around my yard, and in my landscaping, and more. Easy to use, and I love how quickly the weeds just go away. I would recommend.

Yes, I recommend this product.

Originally posted on roundup.com

Viperjpm2
Review 1
Age35 to 44
GenderMale
5 out of 5 stars.

Simply works

2 years ago
Kills everything it touches. Worked great on some invasion dewberry vines that had taken over a section of my yard and behind my shed. It did take a couple applications to cover/kill all of them. You can see the difference between the sprayed leaves verses the non sprayed leaves I'm about 24 hours.

Yes, I recommend this product.

Originally posted on roundup.com

David
Review 1
Age55 to 64
GenderMale
5 out of 5 stars.

Easy to use and convenient.

3 years ago
Product works as advertised. Works well with pump sprayer and easy to use. Just 6 ounces per gallon of water and you’re good to go. I use on my sidewalks and walkways and in my boarder garden in my backyard.

Yes, I recommend this product.

Originally posted on roundup.com

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