Possible Clues:

• Pest and weed control brand
• Straight to the left?
• Maker of GroundClear weed killer
• Big name in lawn products
• Big name in lawn and garden care
• Weed B-Gon maker
• Right introduction?
• GroundClear and WeedClear maker
• Prefix with -dontic
• Weed-B-Gon company