The document describes statistical growth models developed to predict dry matter yield and digestibility of timothy and meadow fescue swards in Finland. It provides 8 models using variables like temperature sum, growing time, location coordinates, and precipitation to estimate values for 3 harvests. The models were developed using data collected from different Finnish regions between 1996-2016. The aim was to improve methods of estimating how grass growth and digestibility decline are affected by climate in Finland, though variability means reliability needs assessment case by case.