.. Steve I appreciate your in put and respect your knowledge and Experience on both C-3 & C-4 turfs. Fact is you are better qualified to answer the question about cool season turf. However I want to make a Big Distinction Between FINE TURF AND UTILITY TURF FINE TURF we use PGR to increase the Health of the turf. They are the kind of PGR that change growth Hormones by redirecting them. Their Goal might be Root Extension and mass or any number of other goals. Therefore we are spending money to maintain a higher Quality expensive turf. UTILITY TURF we use PGR to cut cost while maintaining a erosion control. Therefore we need a ground cover that is both low install cost and even lower maintenance costs. Cheaper PGR that STUNT Growth (like Glyphosate) is a more acceptable product. PS. One More Time IMHO the Utility Turf market if promoted and managed properly could be a Biggie. But there is a huge Learning and teaching curve. You must first educate the customer in order to sell him. ..