<p>Nanoparticles have emerged as potential biostimulants in organic farming, offering a sustainable approach to enhancing plant growth, nutrient uptake, and stress resistance. This review critically examines the role of different nanoparticles, including silica, carbon-based (graphene oxide, carbon nanotubes, fullerenes), metal-based (Cu, Zn, Fe), and bio-nanoparticles (green-synthesized), in improving crop productivity. The primary research question focuses on the mechanisms through which nanoparticles interact with soil microbiota, influence plant physiology, and contribute to sustainable agriculture.&#xa0;A comprehensive analysis of existing empirical studies, laboratory experiments, and on-farm trials was conducted to evaluate the efficacy of nanoparticles as biostimulants. The review integrates findings from peer-reviewed articles and reports on nanoparticle-soil-plant interactions, emphasizing their effects on plant growth, nutrient availability, and abiotic stress mitigation. Regulatory considerations and environmental safety aspects were also explored to assess feasibility for large-scale adoption.&#xa0;Studies indicate that nanoparticles positively influence plant development by enhancing nutrient absorption, modulating microbial communities, and reducing stress effects. Field trials have demonstrated improved crop yields, particularly when nanoparticles are integrated with biofertilizers and precision farming techniques. Despite these benefits, concerns regarding environmental toxicity, scalability, and regulatory gaps remain critical challenges.&#xa0;Nanoparticles hold great promise for organic farming but require further research to establish safe and effective application methods. Addressing regulatory frameworks and environmental risks will be essential for their widespread acceptance. Future advancements in nanoparticle-based biostimulants could significantly contribute to sustainable and high-yielding organic farming systems.</p>