re: too late to fertilize grass?

Late season fertilization (especially with nitrogen) promotes growth. This new growth late in the year can be damaged easily by cold weather.

Everything I've read from LSUAgcenter says the products marketed to "winterize" your lawn does more harm that good. Late August should be the last time you apply fertilizer in South Louisiana.

As the weather cools, take care of the weeds in your lawn and stay on top of fungi. Then enjoy a full green-up next spring.