The present investigation on Standardization of Plant Growth Promoting Substances and Grafting techniques for raising Sohiong (Prunus nepalensis L.) seedling was carried out in the experimental field and laboratory of the Division of Horticulture, lCAR, (RC) for NEH region, Barapani (Umiam), Meghalaya during the year 2009-2010. Different pre sowing treatments with Plant Growth Promoting Substances viz., GA? (50, 75 and 100 ppm), thiourea (50, 75 and 100 ppm), KN0? (0.2 and 0.4 %) along with water soaking were tried to study their response on seed germination and seedling growth characteristics on Sohiong seed. All pre-sowing seed treatments significantly influenced seed germination and subsequent seedling growth and development process. However, GA? @ 75 ppm proved to be the best in overall germination behavior, subsequent seedling growth characteristics and plant biomass production followed by GA? @ 50 ppm. Likewise, two grafting methods viz., tongue grafting and wedge grafting were also tried at 30th September and 15th October to identify the suitable method and time of grafting for raising Sohiong plants. Tongue grafting proved to be the better technique of propagation with respect to days to first sprouting, graft success, sprouting duration, subsequent plant growth characteristics and final survival percentage especially when done on 15th October.