I use a rate of 5 lbs. per 1,000 sq. ft of 19-0-6 Dimension for each app. A pre-emergent combined with fertilizer is just about the same cost as regular fertilizer these days and in most instances, it's cheaper. Round 1 - April 15th - 19-0-6 Dimension @ 5 lbs. per 1,000 sq. ft. Round 2 - May 27th - 19-0-6 Dimension @ 5 lbs. per 1,000 sq. ft. If weedy at the time of application, switch to a liquid fertilizer and add liquid Dimension and a post emergent weed control to the mix and spray all 3 products out at once in a blanket application Round 3 - July 8th - 18-0-8 Allectus (Fertilizer with both Grub and Insect control. It works.