Continuing your lawn care regiment does not stop when the warm weather leaves. It is very important to make sure that each and every step is hit for the entire season to ensure your lawn has everything it needs to make it through the harsh winter and thrive next Spring. By now you should be getting ready to for your final lawn fertilization in the last week of October to first week of November. The best fertilizer to use at this time is a 7-20-8 or a fertilizer with a similar NPK (Nitrogen, Phosphorus, Potash). You want a higher Phosphorus to really help to increase root growth and it can help the roots grow well into December.