I was wondering what you need to do these in New Jersey. Other then the basics for landscaping, do you need a license or anything for laying fertilizer. I know that you need something else for pesticides but does fertilizer fall under that. For hardscaping I have heard that you can do a wall that is less than 4 feet tall. Can you also lay pavers for driveways and walkways, or do you need another cert. from the state?