How much roundup concentrate do I mix with 1 litre water

Roundup Pro
And for tough-to-control, or dense, annuals mix a solution of 2 ounces (4 tablespoons) herbicide to 1 gallon of water. Woody vines and dense brush need 13ounces (26 tablespoons) diluted in 1 gallon of water to kill them; apply to leaves in late summer for best result

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.

Any Roundup Weed & Grass Killer RTU can be refilled with the new 1.25 gallon Roundup Weed & Grass RTU Refill bottle OR use Roundup Super Concentrate (purple cap).

Directions to Refill with Roundup Super Concentrate

• 24oz RTU: 1 oz of RoundUp Super Concentrate, fill with water very slowly to avoid foaming.
• 1/2 Gallon RTU: 2 1/2 fl. oz. of Roundup Super Concentrate and slowly add 1/2 gallon of water
• 1 or 1.1 Gallon RTU: 5 oz RoundUp Super Concentrate, fill slowly with 1 gallon of water
• 1.33 Gallon (PNS & PNG): Add 6.5 fl oz of the Super Concentrate to container and slowly fill with water

If you have the concentrate (label reads Concentrate Plus), the amount of Roundup will depend on the plants you want to kill. Use 6 fl oz (12 tablespoons) for 1 gallon for most plants. If you have seedlings or easy to kill weeds, use 3 fl oz (6 tablespoons) per gallon.

The Super Concentrate may have a different rate. The labels are usually on the manufacturer's web site as PDFs.

I hope this helps.

Cindy Wells

6 fluid ounces of Roundup (12 tablespoons) per gallon of water. Small weed seedlings can be killed with half this strength: 3 ounces per gallon. When using Roundup Super Concentrate, mix 2.5 ounces (5 tbsp.) with a gallon of water to control most weeds and a half-strength solution for small weeds. Roundup Pro Concentrate is the strongest solution available. Spray a mixture of 2 ounces (4 tbsp.) on weeds and half that amount of concentrate on emerging plants. Since Roundup doesn't discriminate between weeds and other plants, use the least amount of herbicide possible to protect desirable vegetation.

Annual and perennial weeds can be controlled with a mixture of 6 fluid ounces of Roundup (12 tablespoons) per gallon of water. Small weed seedlings can be killed with half this strength: 3 ounces per gallon. When using Roundup Super Concentrate, mix 2.5 ounces (5 tbsp.) with a gallon of water to control most weeds and a half-strength solution for small weeds. Roundup Pro Concentrate is the strongest solution available. Spray a mixture of 2 ounces (4 tbsp.) on weeds and half that amount of concentrate on emerging plants. Since Roundup doesn't discriminate between weeds and other plants, use the least amount of herbicide possible to protect desirable vegetation.

Roundup Concentrate Plus is the least concentrated mixable product Monsanto offers. Annual and perennial weeds can be controlled with a mixture of 6 fluid ounces of Roundup (12 tablespoons) per gallon of water. Small weed seedlings can be killed with half this strength: 3 ounces per gallon. When using Roundup Super Concentrate, mix 2.5 ounces (5 tbsp.) with a gallon of water to control most weeds and a half-strength solution for small weeds. Roundup Pro Concentrate is the strongest solution available. Spray a mixture of 2 ounces (4 tbsp.) on weeds and half that amount of concentrate on emerging plants. Since Roundup doesn't discriminate between weeds and other plants, use the least amount of herbicide possible to protect desirable vegetation.

6 fluid ounces of Roundup (12 tablespoons) per gallon of water.

If you're using pro-roundup or agriculture level roundup mix 1 Cup of roundup to 5 gallons of water. This will give you a mixture between 1% and 2% which will kill most undesirables and anything else that picks up the spray.

regular concentrate 6 fl. oz per gallon

super concentrate 2.5 fl oz per gallon