CELBOR is a formulation based on Calcium complexed by carboxylic acids and Boron as a synergistic nutrient, totally soluble and assimilable. The CELBOR formulation is free of nitrates, chlorides and sulfates. CELBOR prevents and cures physiopathologies caused by Calcium deficiency and it is rapidly fixed in vegetal tissues. CELBOR is indeed particularly useful to obtain fruits and berries more resistant to physiopathologies such as apple bitter pit and apical rot, to reduce cracking or splitting of fruits and to increase the resistance to the strokes both at harvest and during the post-harvest. CELBOR, therefore, improves the shelf-life of the treated crops. CELBOR increases the fruit set and, stimulating cell division, it increases the size of the fruits. CELBOR reduces the incidence of salinity, of drought (reducing the drop of flowers, leaves and fruits) and of late frost in any kind of crops.