Enjoy a weed-free vegetable garden without all the work. Preen Natural Vegetable Garden Weed Preventer is the natural way to keep weeds from sprouting! Use the natural weed control in your fruit, vegetable, herb, and landscape beds anytime during the growing season to save time from back-breaking weeding. Preen Natural Vegetable Garden Weed Preventer is formulated to control some of toughest weeds, like clover, bluegrass, crabgrass, foxtail, lambsquartersÊand plantain. Just sprinkle around established vegetables, herbs, and fruits once a month to prevent weeds from returning to your garden. Children and pets can play in the area immediately after application.