I live in west FL and our 2016-17 winter was extremely dry. So dry in fact, that my St. Augustine grass was almost completely brown. I applied Ferti-Lome Winterizer in December and again in March. Once the rainy season started in late May/early June, my grass immediately turned green and looked great. Definitely impressed with this product. If you're wondering why I rated it 4 stars instead of 5, it has to do with the weed preventer. I had a few areas of weeds that I needed to use a separate product to kill the weeds.
I live in south Texas. My St.Augustine was very stressed from the long summer temperatures and two yrs of treating for sod webworm infestation. Within days of applying this product, my grass was greener, and I started seeing runners, and filling in sparse areas. Whatever is in this product, my yard really needed. Reordering for second application in spring. Still see some weeds, but reduced amount.
I'd love to say this worked miracles on my lawn, but alas.... It merely did the job of a good winterizing fertilizer. The grass is significantly greener, and seems to be slowly filling in where the grass was thinking. Good product, good delivery, decent enough price.