Mid August-September- Turf Pro 5-3-4 is the most balanced of our granulated lawn care products. Turf-Pro 5-3-4 can be applied any time from April through October and is designed to thicken the turf and build the root system. Lower nitrogen compliments the use of Weed Ban. Applied in late summer to early fall Sept-Nov, at a rate of 6-10lbs per 1000 square feet, Turf-Pro 5-3-4 will help your lawn recover from summer time damage and prepare for the winter dormant season.