Once the harvest is over, with the arrival of autumn, the vine gradually enters a dormant phase. As for the other plants, the leaves will lose their green color then fall. The sap, accumulated in the trunk and the shoots, will go down to the roots and constitute reserves which will be used to resume the activity of the vine in spring. In the vineyards, the fall of the leaves also marks the beginning of the pruning which will last until March. This manual operation will prepare the vine for the next season, promoting the vigor of the plant, the distribution of its foliage and especially the growth of its most fruit-bearing parts.