A method employing a composition of bioavailable minerals directed at supplementing nutritional intake of a living plant. The composition includes the ionic mineral(s) copper and zinc in a ligand complex and a pharmaceutically acceptable carrier including water, H2SO4 and (NH4)2SO4. The composition for use in the method may also include other supporting plant nutrients such as botanical extracts, urea, plant hormones, vitamins and mineral supplements necessary for plant health.