Certified GKH Gardening Expert
Wouldn't that be convenient!? Luckily, there are some things that work pretty well as long as you have the proper selective herbicide for the particular weed in question. It will likely not be a one-time application, but it will start you in the right direction.
This article will help: https://www.gardeningknowhow.com/plant-problems/weeds/using-herbicide-in-gardens.htm
This article will offer a way to do this with simple cornmeal: https://www.gardeningknowhow.com/special/organic/cornmeal-in-the-garden.htm