Dicophar Dicophar 5L is a weed killer designed to target weeds without damaging your grass or soil. It effectively kills annual, perennial, and broadleaf weeds such as clover, buttercup, thistles, docks, and many more. For best results, apply when at least 24 hours of dry weather is expected and there is little to no wind. Spray your grass during the growing season, preferably when weeds are at or near flowering. Always wear protective gloves and a mask when using this product. Keep it out of reach of children and read the label and product information before use.