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Beginning of the annual growth cycle of the grapevine after Hibernation (see also under BBCH Code ). These break at an average daytime temperature of 8 to 10 ° Celsius those eyes (Winter buds) on the winter pruning were deliberately left standing. The winemaker can recognize this for some time beforehand, because with the coming spring and thawed soil, the roots begin pumping plant juice into the above-ground part of the vine so that water droplets emerge at the intersection of cut shoots (the vine "bleeds"). With increasing warmth, the buds visibly swell until the woody bud shells break open and a fuzzy spherical hairstyle becomes visible, which initially protects the underlying shoot tip from external influences such as sun and rain.

expulsion By thrusting from below, this white or rust-felted hair fuzz continues to swell, until the green hair of the hair crown becomes new shoot erupts. This is initially still very compact with small folded on top of each other leaves, but spread quickly and become larger in the leaf area, while the shoot goes into length growth.

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