Teak is a wood-producing plant that in great demand by the community. However, teak seeds are challenging to germinate due dormancy, so special treatment needed before planting. This research aimed determine effect of hydrochloric acid and soaking time on breaking dormancy seed improve its viability. The first factor was concentration with four levels, i.e., 0 M, 0.5 1 1.5 M. second submerging ...