To choose a weed removal service, make sure they have a license to do the job. Weed-killing chemicals are dangerous, and most states and counties require licenses for professional weed control. Check for the appropriate license on the company’s website and social media pages, or call and ask them directly. Otherwise, read customer reviews online and look for potential red flags in the Better Business Bureau’s company database. Finally, call them and ask about their treatment rate, experience level, and client testimonials.