This week we started grape sampling our Pinot Noir blocks in West Rincon and Rosemary’s Vineyards. Now that we are at nearly 90% veraison (almost all the pinot berries have changed color from green to purple), it’s time to start watching the sugar and acid levels to determine when each block is ready to be harvested.
Our harvest intern, Patrick, spends the early mornings walking the vineyard rows of 10 to 20 different blocks to sample a mix of grape clusters that accurately represent the maturity of each block. Once the grapes arrive at the winery they go through a mini crusher and are strained into beakers to be tested in the lab. We measure sugar levels in degrees Brix using a digital densitometer and we measure acidity with a pH meter. Check out our video with our Assistant Vineyard Manger, Travis Monk.
Rosemary’s Vineyard is the furthest along, with a few blocks at 22 Brix and a pH of 3.05, putting us just a couple weeks away from harvest. Generally we pick our Pinot at around 25 Brix and a pH of 3.4, but our picking decisions are not made just by looking at the numbers. Flavor maturity, tannin development and visual cues in the vineyard are all key factors in the decision-making before every pick.