I've used Scotts Halts in the past with success. 1 bag per 4K sq ft. Put down in mid March and End of Sept. I'm using spray now Prodiamine. There is probably something better, but since I switched I never checked. Hopefully someone smarter can give a top notch recommendation. @Greendoc @Ware. Based on a quick search I found Nitrophos Barricade Granular Pre-emergent Herbicide contains Prodiamine but Ive never used it. It can be found here https://www.solutionsstores.com/bar...MI4_7cq_y82wIVQ16GCh2W3A9PEAYYASABEgL3ZvD_BwE