How do most of you handle this question without boring the customer with all the details of what can affect the program? I have southern lawns. I ofter a pre emergent fall and late winter Two broad leaf controls ( one with Speed Zone and one with Sulfosufuron for grassy weeds too. ) with a light liquid Fert/iron in the spring. One straight liquid hit with Iron. Spot treat broads. One late spring granular with a slow release nitrogen. Fall Fertilization. Seven visits with an upsale of trees and Shrubs fertilization, Aeration and insects.