Seed germination behavior of three tree species of medicinal value viz. Terminalia belerica, T. arjuna and Aegle marmelos, was studied in an open nursery at Chiittagong, Bangladesh. The influence of two different water soaking periods viz. 02 and 24 hours, on germination of seeds, sown both in seed bed and polyethylene bag containing a sowing medium of nursery soil and cow dung (3:1), was determined. Seeds of all three species, soaked in water for 24 hours before sowing and sown directly in polyethylene bag, showed best germination percentages. The results of the study suggest that longer water soaking period of seeds and sowing in polyethylene bag with high temperature could be recommended for better seed germination of all three species studies.