Nano Boron and Nano Zinc were applied to study their effect on leaf nutrient status in Kinnow mandarin plants. A total of 12 treatment combinations were undertaken in the experiment with 3 replications. Leaf nutrient status of Kinnow mandarin was estimated for the various treatments under taken in the experimentation. It was found that the boron and zinc have a synergistic interaction among N, P, and K. The application of boron and zinc increased the concentration on macro nutrients (NPK) in the leaves of Kinnow mandarin plants. The results obtained from the trees treated with zinc (Zn) and boron (B) indicate the potential benefits of applying foliar application of these nutrients to improve tree health and nutrition.. In the study it was found that, treatment T8, which included the application of RDF, Azotobactor, nano boron @ 40 ppm and nano zinc @ 150 ppm recorded the maximum uptake of nitrogen, phosphorous, boron, and zinc. It was also observed that in the same treatment, maximum yield was recorded which is further linked to the availability of nutrients to the Kinnow mandarin plants.