The 18-5-12 Osmocote 50 lb is a professional-grade, controlled-release fertilizer designed for long-term nutrient delivery in nurseries, greenhouses, and landscape container production. Its 18% nitrogen, 5% phosphate, and 12% potash formula provides balanced nutrition, while resin-coated cores release nutrients steadily over 8-9 months. The included QuickStart uncoated prills supply early nutrients for newly planted material, supporting vigorous establishment and sustained growth.