Abstract: Effects of different temperature treatments were evaluated on seed germination and seedling growth of cumin (Cuminum cyminum L.). A temperature range between 15 to 25°C found to be the optimum temperature for cumin seed germination percentage. However, the maximum germination percentage (96.25%) occurred at 15°C. Similarly, the maximum germination rate occurred at a temperature range between 15 to 25°C. Optimum seedling growth evaluated by seedling weight and height was increased with raising temperatures up to 20°C. Temperatures higher than 25°C adversely affected both seedling weight and height. Among the five dates of cumin field planting, April 4 was the best planting time. This treatment had significantly shortest emergence time, highest plant height and yield.