Hello, I want to expand my business and start doing weed control. I am a novice to this side of the industry so please be nice. lol. The information I would like to know is. 1. What is a general chemical I can use that a majority of customers prefer (weed control, grass food, etc)? 2. I live in Canada. But what am I looking at in regards to price (supplies)? 3. Do I need a licence? 4. What is the technical name for some of these chemicals? I thank you in advance!