I share an experience that we are making in Argentina at the Hurlingham Club. Our greens are of paspalum, a summer grass that is native to Argentina, but is being used more and more in the USA, in the transition zone. Buenos Aires and Georgia and the Carolinas have similar weather, although winters in Buenos Aires tend to be milder. The great thing about paspalum is that it is very resistant to irrigation with poor water. It tolerates incredibly good salty water (even ocean water). The problem with it is that, as any summer grass, it goes dormant in the winter.
The usual practice in Buenos Aires is to overseed paspalum or bermuda greens with winter grasses in autumn. The problem with this practice is that it requires the greens to be overseeded at the beginning of autumn, which cuts the golf season right at one of its peaks. In addition, clubs have to incur in substantial costs for this process.
This year we decided at the Hurlingham Club in Buenos Aires not to overseed our paspalum greens. Instead, when they start to become brown, we will paint them with a special paint. The good news is that members can play with excellent greens during autumn and there is a substantial cost reduction. The risks are that since paspalum goes dormant, there will be no growth until spring and, thus, any damage to the green surface will not be covered by growing grass. This can result in poor putting surfaces by the end of the winter, particularly if the winter is very rainy. Our greens have native soil, which as poorer drainage that USGA greens.
It's a bet. We'll see the results by the end of the winter.