There are organic herbicide options that will kill grass but not flowers, including white vinegar or a dish soap solution. Commercial selective herbicides can also target grass over other plants, but read the instructions carefully to avoid damaging your garden. Herbicides that kill grass but not flowers usually include ingredients like clethodim and sethoxydim. Otherwise, your best bet will be to weed by hand.

It usually takes between two weeks and a month for weeds to fully die off after you spray them with herbicide, but they will start to wilt within the first week. Different weed sprays produce different results, with some working more quickly and effectively than others. Similarly, some weeds are killed more easily than others. Consult your weed removal pro for an exact timeline based on their weed removal method.

Each season’s climate influences approaches needed for effective suppression.

Burning is not a recommended method for controlling foxtail grasses. In a large pasture scenario, the fire moves too quickly through the weeds to effectively burn and kill the seeds, meaning they will resprout eventually. If your lawn is overrun with foxtails, it’s best to consult a lawn care professional for suggestions on how to permanently remove it from your property.