The northern courses receive the brunt of their business during the summer, during the growing season. The course is outgrowing the wear. Southern courses see the most traffic in the winter, when grasses are more dormant and sunshine is less prevalent. Wise has to prepare his courses during the growing season to deal with the heavy traffic come wintertime. Grasses differ tremendously from up north to down here.
Northern courses have bent grass greens and fairways, bluegrass and ryegrass roughs.
Most of these cannot take the heat and rainfall of the Florida weather. Most of the preparation that you see in the fall, which may be a little inconvenient play wise, is very important to increase the health and vigor of the turf. If the course isn't at its optimum going into the busy season, the course could see a bad winter. Couple this with a bad winter for growing grass and a superintendent could face huge problems. If you were to go to Augusta National during the summer, you'd probably lose your lunch.