THE VINE’S GROWTH CYCLE II – Bud Break and Flower Cluster Initiation
The grape starts its annual growth cycle in the spring with bud break. In the Northern Hemisphere, this stage begins around March while in the Southern Hemisphere it begins around September when daily temperatures begin to surpass 10 °C (50 °F).
Flower Cluster Initiation
As the vine grows, the maximum yield is set by the production of flower buds. Warm, sunny weather promotes grapevine growth. By the time the shoots are 4 to 8 inches long, small flower clusters can be seen. The clusters will be clearly visible by the time the shoots are 10 to 16 inches long. They can be thinned at this time so the sugars produced by the leaves at later stages are shared among fewer grapes and those grapes grow larger and sweeter.
End of pruning.
Spreading of fertiliser.
Grafting of new vines.
The vine sap begins to rise and the first signs of growth will be seen.
Stakes are cut and their bark is taken off.
They are then blunted and dipped in copper sulphate.
The earth is taken away from the bases of the vines, and is hoed around the plant.
Tying down of the year’s productive cane to the lower wire.
Planting of young vines from the nursery, which were grafted the previous year.
Spreading of herbicide.
First leaves form on the vine.
The new season’s buds burst.
Patricia Arranz Moro
Celler Batea: Winemaker and Comunity manager