Vantage grass and weed killer is a chemical herbicide effective in controlling a vast array of grass weeds that can wreak havoc in your home landscape. Though the word "grass" likely conjures up the part of your gardening space you are attempting to protect, in the case of this herbicide, Vantage targets problematic grasses that are classified as weeds for their invasive, competitive nature.
The active ingredient in Vantage grass and weed killer is sethoxydim, a selective herbicide. Herbicides are either selective or non-selective. Non-selective herbicides kill all plants they contact. Selective herbicides only kill specific plants while leaving other plants unaffected. Selective options are useful in the home landscape when weeds become a widespread problem in grassy areas as you can kill the weeds without damaging your desired plants.
Vantage grass and weed killer functions as a systemic herbicide. These herbicides enter plants through foliage and move throughout the plant's vascular system, according to the University of Florida IFAS Extension. The vascular system includes the internal pathways within which water and nutrients pass to all parts of the weed. Systemic herbicides slowly kill weeds by inhibiting growth and burning the plant over time. Effects may take two days to three weeks before they become apparent.
Vantage grass and weed killer is effective on annual and perennial grass weeds. It is safe to use this herbicide on plants that are not grown for edible use. Vantage does not, however, control broad-leaf weeds or sedge grasses. Grass weeds controlled with Vantage include, but are not limited to, barnyard grass, love grass, quack grass, red sprangletop, crabgrass and witchgrass.
Vantage is a postemergence herbicide. Such herbicides are effective on actively growing weeds. For optimal results, avoid applying Vantage during drought and allow a waiting period of several days before mowing, according to the University of Florida IFAS Extension. The recommended rate for grasses up to 6 inches in height is 4/5 fluid oz. for every 1,000 square feet. For grass taller than 6 inches and reaching up to 12 inches in height, apply 1 2/5 fluid oz. of Vantage for every 1,000 square feet.
Vantage is toxic to humans and animals. Keep this product out of the reach of children and animals. Avoid ingestion and inhalation. Cover all skin with clothing, socks and shoes, wear chemical-resistant gloves and use protective eyewear. Vantage grass and weed killer can result in moderate eye injury and other dangerous reactions. Follow the first aid recommendations on the label if exposure occurs and immediately contact 911 or poison control.