I just got my license and I have a customer who wants 4 treatments. Is this what I should do?--first April pre emer/ fert, middle of May fert/ spray weed kill, September fert/spray weed kill, and winterizer end of October. Is this right? He also wants grub control so I will do this in first of August. I am treating 25000 sq. ft. and I plan on charging 2.50/1000sq ft.($60 per app) is this about average? What should I charge for the grub control? Thanks for the help guys.