When your sod was installed S & E Ward’s applied fertilizer to the soil. This was done to ensure nutrients get to the new roots that quickly develop. This application of fertilizer will last you the next 6 to 8 weeks depending on how much is leached away from heavy watering. Most lawns in western Colorado need 3 to 4 applications per season to evenly apply proper nutrients to ensure a healthy turf. If you fertilize your own lawn remember to not use weed and feed on a newly sodded lawn. Use professional products not inexpensive ones and always follow instructions according to manufacturers. If you would like, our staff can give you an estimate on cost for us to come back and properly apply the correct types of materials.