Some grasses, such as St. Augustine (Stenotaphrum secundatum), seed without growing very tall, but the seeds are usually not viable. St. Augustine grass grows best in U.S. Department of Agriculture plant hardiness zones 8 through 10.ome grasses, such as St. Augustine (Stenotaphrum secundatum), seed without growing very tall, but the seeds are usually not viable. St. Augustine grass grows best in U.S. Department of Agriculture plant hardiness zones 8 through 10.