Goosegrass, a widely distributed annual weed, creates difficult problems in heavily used turf areas. The seriousness of this weed problem, especially on golf course greens and tees, has suggested studies for its control. Very little research has been conducted in regard to this grass. Germination studies by Toole and Toole3 showed that 0.2% potassium nitrate was superior to water when used to moisten the substratum. Their work also indicated exclusion of light had little effect on germination at alternating temperatures of 20°–30°. The present study includes more complete temperature and light comparisons, and attempts to demonstrate light and temperature effects on seed germination.