The area where I live has some of the worst sports field turf that I've seen. Drive across the province and you will see a ton of amazing school and municipal sports fields. Even in the driest parts of the province, the grass is pristine. Enter the "Rainforest" on the coast and the grass quality is terrible. It has absolutely nothing to do with with the skill of the turfgrass managers, the amount of fertilizer they use, or the mowing frequency. It has everything to do with WATER. In a recent post I discussed how we can determine how many "good days" we have each year for growing grass. That is the number of days where the growth potential is above 20% AND the 7 day effective precipitation (EP) divided by the 7 evapotranspiration (ET) is greater than 60% (60% is the crop coefficient for turfgrass). Most people would be surprised to learn that the PNW is a pretty bad area for naturally (no irrigation) growing grass. We either get good temperatures for growing gr