The photograph above shows a Concord grape cluster in its infancy. The grape berries above are about the size of pinheads by early June. The vines form buds in March and undergo bud break later in spring. Those buds form the new growth of the vine's canes, leaves, and feathery clusters. The grapes will continue to grow larger, juicier, and sweeter as the season progresses until harvest time in September.
Note that the Concord grapes have green skin at this time. Around mid-July the grape skins will develop purplish-red coloration in response to sun exposure. This changing of color is called veraison, a French terms that refers to the onset of grapes ripening and developing color. Steady sunshine and hot dry weather is preferred throughout summer until harvest so that the grape skins attain a deep rich color (for a rich wine color) and sweet juice that aids fermentation.
Guests who take our winery and wine cave tours during spring through early fall before harvest often have the opportunity to take a vineyard stroll, if the weather is suitable. The vineyard visit enables tour guests to see the current state of grape development and learn about work we're doing in the vineyards at each stage of the season. Visit the home page of the website or our Facebook page to book tickets for an upcoming tour.