Everyone using growing degree days (GDD) in turf management should be sure they are calculating them and working with them in just the right way. This new guide on the nuance of growing degree day calculations from Bill Kreuser and UNL explains the calculation and makes sure you have all the information you need:

“There are subtle differences between the many different GDD models found in turf. It’s important to understand these differences because they can be the difference between a model working great and being a massive failure.”

The Greenkeeper app is a really useful tool for making sure these calculations are correct.