The performance of sweet orange (Citrus sinensis L.) were studied 40-year-old trees. The trees were spaced 6 meters apart and grown in clay soil with a drainage well, under a surface irrigation system. Different forms of foliar fertilization using microelements were studied in two consecutive seasons 2021 and 2022. The study aimed to know the effect of foliar fertilization with a mixture of iron (Fe), zinc (Zn), and manganese (Mn) in their nano, sulfur, and chelated forms. The leaves were sprayed at three different times: before flowering, after fruit set, and two weeks after fruit set. The results showed that chelated and nano fertilizers significantly enhanced the vegetative growth in Sukkari orange trees compared to mineral fertilizers. It is worth noting that chelated fertilizers produced the highest results, followed by nano fertilizers in second place. In contrast, mineral fertilizers resulted in the lowest vegetative growth characteristics during both seasons in Sukkari orange trees.