This study investigated the effects of seed priming and foliar spraying with micronutrients (zinc and iron, in both nano- and chemical forms) on the quality of forage corn (Zea mays L.) under field and greenhouse conditions over two years. Treatments included nano-iron chelate, nano-zinc, chemical iron chelate, chemical zinc fertilizer, distilled water, and control. Nano-iron increased leaf chlorophyll concentration, plant height, dry biomass, crude protein, and soluble carbohydrates. Both nano- and chemical zinc improved plant growth and quality, with superior results from nano-zinc. Nano-fertilizers enhanced phosphorus concentration, biomass, and nutrient efficiency compared to chemical fertilizers. Results suggest that nano-fertilizers can improve forage corn productivity and quality while reducing fertilizer use.