Barricade DG Pro is one of the best and most cost effective granular weed preventer herbicides on the market. It is labeled to help prevent over 30 grass and broadleaf weeds in established turfgrasses, lawns, landscapes, and ornamental beds. It contains .48% of the active ingredient Prodiamine. Please refer to product label for complete application rates and timings. The product must also receive rainfall or irrigation in order for the herbicide prevention zone to become active.