Abstract: A fertilizer concentrate composition comprising (1) 80-90%, by weight, of water-soluble salts of plant micronutrients, 10-18 mole percent of said salts being in complexed form, and (2) 0.7-1.75%, by weight, of a stabilizer comprising a solid, water-soluble polymer in powder form having a particle size such that 80-90% by weight, of said particles have a diameter <0.1 mm and less than 0.5 percent, by weight, of said particles have a diameter >0.5 mm, (3) balance, complexing agent for said micronutrients, with the proviso that the amount of complexing agent is chosen so that 10-18 mole percent of the micronutrients are complexed and, optionally, (4) 0.05-0.5%, by weight, of a surfactant, provides a storage-stable, readily soluble micronutrient concentrate usable especially in fertilizing crops by leaf dressing.