Poa annua greens are another type of cool-season grass that is commonly used on golf courses. Poa annua greens have a similar density to Bentgrass greens, but they have a coarser texture. They are also less susceptible to disease than Bentgrass greens. However, Poa annua greens require more watering than Bentgrass greens and can be more difficult to maintain in cooler climates.