Understanding the ecology of weed seed germination helps to predict the potential distribution and development that might be effective for making strategic practical management decisions. Emerging response of three-weed including wild mustard, jungle rice and milk thistle was evaluated with regard to soil depths (0, 2, 4, 6, 8, 10, 12 and 14 cm) in the greenhouse condition. Using logistic function to quantify the response of emergence to planting depth showed that the emergence percentage declined with increasing the depth of planting. So that, the maximum emergence of milk thistle, wild mustard and jungle rice at 0 centimeter depth was (93.34%), (37.38%) and (30.28%) and the minimum emergence was estimated at 6. 8, 10, 12 and 14 centimeter (zero percent) for wild mustard and jungle rice, respectively. Also, it has been estimated the burial depth of 6.71, 5.79 and 3.15 centimeter was able for 50% inhibition of the maximum seedling emergence of milk thistle, jungle rice and wild mustard. All parameter modeled by Hill function showed that, by increasing depth, time for achieving 50% of germination, time to first seedling emergence (Dlag) and germination uniformity, increased and declined respectively. As, the D50 and Dlag values were at least at depth of 0 cm.