Zeal Biological Agriila Boron Nutrient For Growth Regulator | 500 gm. Zeal Biologicals Agrilla Boron Nutrient Growth Regulator (500 gm) is a micronutrient fertilizer containing Boron, essential for healthy plant growth, flowering, fruit set, and overall crop productivity. Boron plays a key role in cell wall formation, root development, uptake of phosphorus and potassium, and metabolic reactions within plants, improving structural integrity, germination, and yield quality. The product is suitable for all crops and helps correct Boron deficiencies effectively.