hi i live in mass. can i fertilize without a liscense..or do u just need a liscense for spraying pesticide?Also for a common lawn what is th ebest fertilizer to apply in march?Also how many applications do u have to make..i hear all these horror stories of how a landscaprer burnesd a customers lawn whay is that? Are u only to make 1 pass with thew spreader and not to use the wqhole bag?im not an expert in this area....i only do what they tell me to do on the back of the bag and adjust my spreader..am i right =b only making the one pass? thank u all everyone is so helpful and have answered a ton of my stupid questions..may we all prosper this year,and good health to all!!!!!!!