In order to quantify the cardinal temperature and hydro time germination of cuminum cyminum seeds, two experiments were conducted in complete randomized design with three replications in seed technology laboratory of Faculty of Agriculture and Natural Resource of University of Mohaghegh Ardabili in 2018. In the first experiment, treatments were included: temperatures, 0, 5, 10, 15, 20, 25, 30, 35 and 40 ˚ C and in second experiment treatment water base potentials included: 0,-0. 2,-0. 4,-0. 6,-0. 8,-1 and-1. 2 MPa. In order to quantifying cardinal temperature for germination fraction for 10, 50 and 90 % were evaluated from four models: beta, modified beta, dent-like and segmented. In this study the RMSE, R 2 and AICc were used for comparison between models. Result indicted that beta described better responses of germination rate (except D10) of cuminum cyminum to temperature compared with others models. However basic temperature of cuminum cyminum was between 0. 7 to 0. 9 ˚ C, optimum temperature about 20 to 21 ˚ C and maximum temperature was 35 ˚ C. In addition based on result of hydro time models, θ H, and Ψ b (50) for cuminum cyminum were estimated 97. 5 MPa h-1 and-0. 46 MPa respectively.