The warm season turfgrass growth calendar, below, is completely different. This represents grasses like Bermudagrass and Zoysiagrass growing in Georgia, Alabama or Florida. You can see, rather than 2 flushes of growth, there is just one pronounced season. This tells us that these types of grasses may be weaker and more injury prone in the spring and fall when temperatures begin to drop. Of course, they go dormant in late fall until the next spring.
This is a good way to show this information but what does it actually mean? Well one example, you can see the most ideal time to aerify greens in terms of when you will get the fastest recovery. Bentgrass should be done in spring or fall and Bermuda is ideally aerified in the middle of summer. We aerify when the turf is on the downward trend in November, meaning it won't heal until we get the uphill trend in spring. The Bermudagrass growing superintendents have an advantage because the slower time (in terms of member usage) in those climates is the most ideal time to perform agronomic practices. We cool-season turf growers are the opposite. Our most ideal time to do this kind of work is at our busiest times of member useage! It is really that simple and grass growth is a function of temperature, with other things like fertilizer offering little help. Specifically, I can apply a lot of Nitrogen in March to speed the recovery effort but the grass still won't grow because the temperature isn't ideal. Adding more fertilizer will come back to haunt you in the early part of the season when it releases all at once and mowers can't keep up with the growth, leading to host of other issues.