I've been cutting grass for the past 3 to 4 years. It's really started booming the past 2 years. On October 27th, I can get my Commercial Pesticide License at a local Farmer's Market. However, I don't know much about the subject or anything else about spraying, fertilizing, overseeding, etc. I would like some resources so that I can read up on this and be able to do more for my customers. Can anyone point me in the right direction?