Fertilizers play a pivotal role in ensuring food security. When applied at the correct time and quantity, they enhance crop yields, protect soil health, and improve crop nutritional quality. Recent advances in fertilizer technology focus on enhancing nutrient use efficiency, with growing attention on incorporating essential micronutrients alongside macronutrients. This study evaluated the physicochemical properties—moisture content, critical relative humidity (CRH), chloride content, pH, solubility, compatibility, and caking tendency—of water-soluble N-P-K fertilizers of different grades: 15-15-15 without micronutrients, 15-15-15 with three micronutrients, 15-15-15 with five micronutrients, and 14-14-14 with seven micronutrients. The 14-14-14 formulation with hepta micronutrients demonstrated superior physicochemical properties among the tested grades, indicating the significance of micronutrient fortification in enhancing fertilizer quality.