Fertilome New Lawn Starter is a must for new lawns in order to develop a strong root system on each blade. It's formulated with a 9-13-7 when preparing soil for seeding in the spring or for sod. It will help your grass to grow healthy root systems more rapidly which lets your lawn grow in quicker and greener. Apply Ferti-Lome New Lawn Starter Fertilizer 9-13-7 with your grass seed as you seed your lawn or immediately afterwards.