The ability of Cymbopogon jwarancusa (Jones) Schult, to displace Chrysopogon aucheri (Boiss.) Stapf. on Baluchistan grasslands may be related to differences in recruitment potential in addition to differences in payability and grazing tolerance. A controlled environment study was designed to investigate the effects of different temperature regimes on germination responses of these two dominant range grasses. Cumulative germination and rate of germination (mean germination time) were evaluated at six alternating temperature regimes (5/10. 5/15. 5/20, 10/20. 10/25 and 10/30°C. 12 h night/12 h day) representing possible temperatures in western Baluchistan during the recruitment period (March- May). In addition to having greater seed fill and viability. Cymbopogon jwarancusa had greater and more rapid germination than Chrysopogon aucheri at a wider range of temperatures, especially cooler temperatures. These germination responses indicate that Cymbopogon jwarancusa is superior to Chrysopogon aucheri during the initial stage of the recruitment process.