In October, most areas of the northern hemisphere are in harvest and going full out! Many white varieties finish in early October. Although some reds (particularly early-ripening Pinot Noir) may have started harvest in September, generally, October is the month when most red varieties are picked.  In September’s post, we explored the harvest parameters for white grapes.  The factors that a winemaker considers when picking red grapes are similar… flavor, acid, sugar, etc.  However, there are two key harvest parameters that are more important (and impactful) for reds than whites: tannin ripeness and anthocyanin accumulation (color).