Berry Development Stage II - Lag Phase to Veraison

In the lag phase overall berry growth rate has slowed.  At the start of the lag phase, berries have reached at least half of their final size.  The lag phase is less prominent in seedless varieties compared to seeded varieties.  In this period the berries reach their highest level of acidity. 

The ripening stage begins when berries begin to soften and the color begins to change.  In green varieties the color begins to fade and in colored varieties the red or black color begins to appear.  This sudden change in color and berry softening is also known as “veraison.” 

Lag Phase to Veraison

Lag Phase to Veraison

Lag Phase to Verasion