Jonathan Green Seeding & Sodding Fertilizer 5,000 sq ft – High-phosphorus lawn fertilizer specially formulated to support new grass growth when seeding or installing sod. Designed to promote quicker, thicker root development, it helps young lawns establish strong roots to better withstand seasonal stress. This formula also contains humates to improve nutrient availability and soil efficiency, feeding new grass for up to two months. Apply the same day as seeding or sodding to help new lawns get off to a healthy start.