Fertilize your new sod lawn about four to six weeks after it was planted. This will give it ample time to root in its new soil.
Spread a high-analysis fertilizer with a fertilizer spreader to help your sod continue to grow vigorously. Your summer fertilization should be with something similar to 5-14-42 NPK (Nitrogen, Phosphorus and Potassium). Continue to fertilize your sod every six weeks.
Water your sod lawn well with sprinklers to help the fertilizer sink in. However, don't fertilize a wet lawn. This could cause the fertilizer to stick to the grass blades and burn them.
Apply a 20-10-10 NPK blend of fertilizer to your lawn in the fall when you begin to winterize your yard. This will give it enough nutrients to survive the winter.