To evaluate the growth characteristics and seed production, two imported warm season grass and seven native grass species were divided into two groups, tall and mid-grass and grown under pot and field conditions. The results obtained are as follows; (1) A range of 25 to 30 days was required from seeding to 50% emergence of the; grass species when sown in spring. The establishment percentage of native grass species showed a range of 6.3 to 19.5% and that of imported grass species was 22.7 to 23.2%. (2) Of the grass species, Pennisetum japonica, Andropogon micranthus and the imported grass species were the highest in seedling height. In tillering characters, Andropogon micranthus showed the highest, Spodiopogon cotulifer, the lowest and the other species found to be medium. (3) It was found that Panicum coloratura was one of the eariest heading species. The heading of Panicum coloratura was observed at the end of July, but that of Paspalum dilatatum and P. thunbergii was recorded at the beginning of August and the other species appear to be more later. (4) Calmagrostis arundinacea was one of the earliest starting species sprouting on 15th of March, Pennisetum japonica was the latest species and the other species found to be medium. Calmagrostis arundinacea showed the longest growing characteristics, 246 days, intermediate species were Paspalum dilatatum, Panicum and Andropogon micranthus, and Pennisetum japonica found to be the shortest. (5) In the percentage of germination, Pennisetum japonica and Arundinella hirta were the highest, 12.0% and 78.6%, but Spodiopogon sibiricus and S. cotulifer showed the lowest, 15.3% and 11.3% respectively. (6) In seed production, Arundinella hirta and Spodiopogon cotulifer gave a satisfactory performance, 126 ㎏ per 10a, but all other species were less, ranging 58 to 86 ㎏ per 10a.