Well I've got to finally break down and learn how to do this stuff. I've had current customers hounding me to fertilize their yards and I've been putting them off for lack of knowledge about it but I think I'm missing out on making a lot of money with this extra service. I live in NW PA and the we are just starting to break into spring full force now....the grass is not quite growing yet. Here are my questions: How important is aeration? I understand dethatching but I don't see that matted effect on many of our properties. How important is dethatching if you don't see a deep layer? Also, do I need a license to fertilize? I know I can get my hands on stuff like Scotts 4-step but do you use bulk fertilizer and where do you get them? Lastly, at this time of the year, what is the process to convert a regular ol lawn into a lush green yard? Meaning, fertilize now? seed in fall? aerate now?....what's your timetable to do it right and make it look nice.... Also, I'm aware that every situation is different, I'm just trying to increase my knowledge base. Thanks a lot!