Fertilize your lawn properly, If you live in southern areas where lawns feature warm season gr.es, fertilize turf in late spring or early summer, .Fertilize your Kentucky bluegr., perennial ryegr., tall fescue, or fine fescue lawn with Scotts Turf Builder Triple Action. It will give your lawn the nutrients it needs to get thick and green this spring, helping the grestablish deep roots so it will stand up stronger to heat and drought later in the growing season..Fertilize when the grstarts to turn green in spring. The growing season for these gr.es, depending upon the geographic area, is during late spring and summer. Warm season gr.es grow best when the temperature is in the range of Fahrenheit, although they will also grow outside of this range..Second only to the fall, spring is next most important time of the year to fertilize your lawn. Spring gr.es come to life hungry and ready to be fed..