Jonathan Green Veri-Green Fertilizer for Seeding & Sodding, 15,000 SQFT, has been specifically formulated to grow quicker and thicker grass roots which are essential for surviving the stresses of summer and winter. Our seeding and sodding fertilizer is rich in phosphorus which is a key component in root formation for the development of new seedlings. This product also contains humates that enhance the efficiency, availability, and exchange of plant nutrients to and from the soil.