Rangeland-planting is one of the costly range restoration method which leads to lots of changes in nature. Hence, making decision for range-planting in degraded range needs extensive studies. Iran is placed in the dry region of the world and most of its rangelands are placed in the arid and semi-arid region, so performing the basic researches about the plant which adapted to this region are unavoidable. The aim of this paper is study of Onobrychis subnitens drought resistant. Results showed that when water potential was increased, germination percentage and germination rate were decrease. Increase of drought stress cause to increase mean germination time.