Item shipped by supplier in a few working days Foliar fertilizers Trio-Blu 3ERRRE fertilizer based on Copper, Sulfur and Boron €15.00 Trio-blu, FLOW mixture fertilizer in water-soluble fluid paste, obtained from copper, sulphur and boron oxychloride. It quickly corrects sulfur and copper deficiencies by providing a dose of essential elements for the protein synthesis of the vegetative system. Item shipped by the supplier with dedicated courier. See