Veraison

The onset of ripening. The change of color of the grape berries. Veraison represents the transition from berry growth to berry ripening, and many changes in berry development occur at veraison.

Tertiary bud

The smallest of the three buds in an overwintering compound grape bud; generally more cold hardy than either primary or secondary buds but the least fruitful; usually does not develop unless the primary and secondary buds have been killed.