The hard seed coat cause physical seed dormancy and low germination rate in Albizia lebbeck (L.) to overcome this physical dormancy of seeds were pretreated with different external effects. Present study was investigated to find out the most suitable pretreatment method that will increase the germination percentage. The fresh seeds of Albizia lebbeck (L.) were collected from three different localities viz. Chitrakoot, Naro and Papara belongs to Chitrakoot, Satna and Jigna forest range respectively. Different external effects were studied for breaking dormancy of seed viz. Environmental factors, Mechanical scarification, Electric shock, Photoperiod, Photosensitivity, Wavelength, Light intensity, Dry heat, Alternate temperature, Wet heat, Chilling, X-ray radiation, Ultraviolet radiation and far-red radiation were given to break the dormancy of seed germination of Albizia lebbeck (L.). Maximum 100 percent germination was observed at far-red radiation treatment. However, Photosensitivity and Electric shock treatment were showed insignificant results.