Improved formula with Trimec technology that provides broadleaf weed control of 200 plus lawn weeds, including dandelion, clover, chickweed, common purslane, etc. Use anytime of the year when weeds are actively growing, spring through fall. Use on cool and warm grasses. Use when you want to control weeds without fertilizing; does not contain fertilizer. Delay seeding for 4 weeks after application.