What are the Stages of Grape Berry Development?

The grape berry development, when the grape berries grow rapidly after sitting on the fruit, is the most vigorous period of the vine's annual growth period.

Stage I: Berry Formation to Lag Phase

It is a period of rapid growth in the number of cells, during which fruit expansion is influenced by the quality of bud differentiation, pollination, and nutrient supply.

Stage II: Lag Phase to Veraison

It is the period of cell volume increase. this period is affected by root quality, leaf quality, nutrient supply, etc. After a lag of 5 to 10 days, the cells swell and continue to accumulate acids and tannins, which reach their maximum level during the color change period. At this stage, the seeds reach their final size 10 to 15 days prior to color change.

Stage III: Post-Veraison Berry Ripening

The third period of the grape berry: the period of increased cell gap, the fruit hardens, requiring a large number of carbohydrates and the accumulation of dry matter in the fruit, depending on the accumulation of nutrients in the grape root system and leaves, this period should pay attention to strong roots and leaves, to prevent premature failure of the root system and leaves.