Possible Clues:

• Brand name in lawn care
• Prefix with -dontist
• Weed killer brand
• Prefix meaning “correct”, eg in a word related to dentistry
• Company that makes Bug B Gon
• Lead-in to -dontist
• Bug B Gon's brand
• Sister brand of Miracle-Gro
• Maker of Weed B Gon
• Weed killer manufacturer