@Dkd114 Yes, crop coefficient is the best way to get it to water more frequently. However, that 0.8 crop coefficient already seems fairly high assuming a warm season grass. Are your healthier zones using the same turf type and soil? If you haven't preformed catch cup testing it could be an issue of irrigation coverage. Maybe that zone has a lower efficiency or pr? Check both zones, note any differences, and make sure you they should indeed be different. Feel free to post any of that info here.