Iron (Fe) index was studied in 19 cultivars of muskmelon (Cucumis meloL.) throughout a growth period. All cultivars were grown under greenhouse conditions and were sampled each 15 days. Leaf material was analyzed in order to determine total and hydrochloric acid (HCl)‐extractable micronutrient concentrations in leaves. Total iron (Fe) content was particularly high in cv. Galia and low in cv. Amarillo Canario. Cultivar Cantaloupe showed the highest levels of total manganese (Mn) and zinc (Zn) while lowest of total Mn were recorded in cv. Arava, and lowest total Zn content in cv. Alma. Cultivar Gold‐King showed the highest foliar levels of total copper (Cu), and this micronutrient was lowest in cv. Hum. 2627. Greater differences between cultivars were noted in terms of HCl‐extractable micronutrients. Bayon and Num. 1213 showed very low values for total Fe index, which was highest in Amarillo Canario. Optimal nutritional ranges in the cultivars analyzed were variable but generally high for micronutrients as well as total and soluble Fe index. The evolution of these indices, conditioned by the number and size of sink (fruit), was similar in all cultivars.