I would like to add fertilizing services this fall, especially since 2 of my customers are requesting it. My plan was to buy a broadcast spreader and just pick up the stuff at Home Depot, but I'm not sure what kind I should use and I'm really not sure on the pricing either. It doesn't take long for a small lawn, but I wanted some professional opinions. 1. What is the best mix in the fall for fertilizing, considering I do not plan to use any weed killers and can I buy my own Nitrogen and other compounds and mix them myself to save money? (Most of the lawns are St. Augustine, but some have thin grass that is probably Bermuda) 2. When is the best time to apply it in South Texas? It is still kind of hot right now. 3. What is a good rule on pricing (I estimated one lawn is about 4000 square feet and the other one is smaller)? And one other question: One customer that asked for fertilizing told me her last lawn guy just charged her the price of the fertilizer, and I don't feel that I should do it for free, especially since I have to buy a spreader, but could I just mark up the price of the fertilizer?