Grape Fruit Maturity Report from Peninsular Ag Research Station (PARS)
Continuing until harvest, we will report the fruit ripening chemistry metrics for the cultivars at PARS in Door county, measures that are typically used to gauge timing of harvest for cold climate grapes: total soluble solids (TSS; sugars, primarily; measured in Brix %), titratable acidity (TA, measured as tartaric acid equivalents in g/L), and pH.
Date | Variety | Brix | pH | TA (g/L) |
9/30/20 | Valiant | 17.2 | 3.17 | 23.62 |
9/30/20 | St. Croix | 18.4 | 3.16 | 20.24 |
9/30/20 | LaCrosse | 16.8 | 3.08 | 19.28 |
9/30/20 | Brianna | 20.2 | 3.26 | 12.33 |
9/30/20 | Frontenac | 19 | 3.05 | 36.82 |
9/30/20 | Marquette | 20.8 | 3.15 | 23.58 |