The mixture ratio for Roundup depends on the concentrate selected. Concentrate Plus requires 3 ounces of herbicide to 1 gallon of water. Super Concentrate calls for 1.5 ounces of herbicide to 1 gallon of water. Roundup Pro requires 6.5 ounces of herbicide to 1 gallon of water.
Roundup is a commercially available systemic herbicide used to kill or control unwanted weeds and grasses. The active ingredient in Roundup is glyphosate, which is a non-selective herbicide that can kill most plants. Roundup comes in ready-to-use and concentrate varieties; each product is specifically formulated to address specific weed and grass control needs.