Albizia lebbeck (L.) Benth. or 'siris' is one of the important tree species in arid and semi-arid regions of India. It is believed to be wild in the sub-Himalayan tract from the Indus to the Khasi Hills and the Andaman islands. In the Western Himalayas, it ascends up to 1500 m elevation. It has a great potential to be incorporated under social forestry programs due to its multipurpose use. Seeds of Albizia species are exogenously dormant due to impermeable seed coat or pericarp to water which is responsible for low and irregular germination resulting in to low quality uneven stock. The identification of suitable dormancy breaking treatment holds great promise in the production of evenly grown nursery. The present volume is a dissertation work of the first author Suman Malla at master's level submitted to Uttar Banga Krishi Viswavidyalaya (UBKV), Pundibari, Cooch Behar West Bengal (India) under the guidance of the third author Dr Sumit Chakravarty, Assistant Professor, UBKV Cooch Behar.