“” Weed & Grass Killer

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The Roundup you are using is manufactured by Monsanto. You can call them 1-800-332-3111 for information on using this product.

Hilary @Scotts

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Use 2% fl oz (5 Tbs) per gallon of water for each 300 sq ft. If soil is dry, water before application and 2 to 3 days after application. – If green patches remain after 7 days, reapply.
Answer: RoundUp Pro Concentrate is mixed at 0.5-10.5 fl oz per gallon of water per 1,000 sq ft. Please refer to the product label for the specific dilution ratio that fits your needs on the targeted weeds/grasses. 91 of 455 people found this answer helpful.
RATE: 10mL per litre of water.

Apply when weeds are actively growing. Apply to ensure complete and uniform wetting of foliage.

General Use Rate: 10mL per litre of water.
Use a 1% solution ie: 1 litre/ 100 litres of water, and completely wet the foliage but do not allow to run-off. Apply only to healthy, actively growing plants with adequate leaves for herbicide uptake.
For best results, add 2.5 fl. oz. of the concentrate to 1 gallon of water. Use of a Roundup brand sprayer is recommended.
Apply a solution of 400 ml ROUNDUP PRO BIACTIVE per 1 litre of water. Applications of lime, fertiliser, farmyard manure and pesticides should be delayed until 5 days after application of Roundup Pro Biactive.
Answer: Roundup Pro Concentrate can applied in a hand held pump sprayer at 2.4-4 fl oz per gallon of water. You will use the finished solution within 24 hrs of mxing. Please refer to the product label for full mixing and application instructions.
The instructions recommend using 3–6 fluid ounces (89–177 mL) of Roundup for every 1 gallon (3.8 L) of water, but you may be able to get away with using as little 1–2 fluid ounces (30–59 mL) to kill off small or sparse vegetation.
Mixing Directions: For best results use 2 ½ fl. oz. (5 Tbs) per gallon of water. One gallon of water will treat approximately 300 sq ft.
Answer: When using Roundup PowerMax II Herbicide in 25 gallons of water you can use anywhere from 13 fl oz to 7 quarts.
It is particularly effective in killing brambles, thistles, and nettles, regardless of their growth location. The recommended dilution rate for Roundup XL is 40 parts water to 1 part herbicide.
When using Roundup PowerMax II Herbicide in 25 gallons of water you can use anywhere from 13 fl oz to 7 quarts.

Discover Relevant Questions and Answers for Your Specific Issue

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I need to know How much roundup per gallon of water.
Also, can I mix Krovar with it and if so how much per gallon?
ANSWER : I use 3 oz. of Roundup to every gallon of water and it kills even the local star thistle. They can be used together with the Krovar ratio at 2.4 oz. per gallon.

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What is the mixing ratio for roundup – Roundup "" Weed & Grass Killer
ANSWER : Hi,It is very nearly the same a a two cycle gas oil mix… 50-1or about 2.5 ounces to a gallon of water…heatman101

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Amount of mixture – oz.of concentrate to oz. of water
ANSWER : 6 oz per gallon of water for weeds and lawns

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Roundup superconceterte mixing – Roundup "" Weed & Grass Killer
ANSWER : I assume you are talking mixing ratios. In most cases a 1% roundup to water mixture will kill many plants. On very stubborn species you can go to a 2% concentrate but anything above that in my opinion you’re just wasting your money. More isn’t always better when it comes to weed killers.

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How do you get the top off? – Roundup 2 Gallon Pro Garden Poly Tank Pump Sprayer (Roundup)
ANSWER : Howdy chloebuckski,This is a question that I get quite often. Here is the answer; with some pressure push the handle inward while turning counterclockwise. When you feel the handle sink in, keep turning and you’ve got it.Hope this helps,Coach Davecommunity.homedepot

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I got a roundup sprayer at a garage sale. I don’t know how to fill it. It has a model # 020p10 Any assistance you can provide will be greatly appreciated as there is no manual. Larry
ANSWER : The handle pushes down and locks to be carry or to unscrew it. Push handle down, then twist left to unscrew. It may take a bunch of force to start. Better to hold the sprayer down and relieve all pressure before doing the unscrew.

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I just want to know how much of roundup to put in the tank, you use air to disperse the weed killer?
ANSWER : Hello,

Yes I do use it, you can put about 1qt of round up for every gallon of water. This should kill your weeds, for most precise mixing instructions check the bottle label.


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When I mix Roundup consentrate plus with the correct amount of water and fail to use it for several weeks, a film/slim forms in the applicator bottle that prevents the mix from spraying (clogs the spray nozzle). Any ideas or is this a known problem?
ANSWER : Take the spray head off and soak it for 5 minutes in peroxide

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