CONTROLS OVER 200 BROADLEAF WEEDS - Lawn Weed Control is designed to control over 200 broadleaf weeds including dandelions, chickweed, oxalis, poison ivy, thistle, and more. This product will not kill crabgrass, which is a grassy, not broadleaf weed. POST EMERGENT WEED CONTROL - This weed killer should only be spread where weeds are visibly present since it is a post-emergent and not a pre-emergent weed control. Lawn Weed Control can be used any time of the year when weeds are actively growing. COOL & WARM SEASON GRASSES - Our broadleaf weed control can be used on both cool and warm-season grasses. This product will not burn your lawn. CONTROLS TOUGH WEEDS - For particularly difficult weeds, a second application of Lawn Weed Control can be made 30 days after the first application. COMPLETE COVERAGE - This 30 lb bag covers up to 15,000 sq. ft. For optimal results spread this product on a moist lawn so the weed control granules stick to the plant leaves.