This bulletin aims to: (1) develop and adopt seed source definitions and classification suitable for the Nepalese farmland context; (2) provide a practical guideline for the establishment and management of such type of tree seed sources in Nepal; and (3) discuss the advantages and disadvantages for the different seed source type. The guideline consists of four sections: an introduction that presents the Tree Improvement and Silviculture Component context, section two that introduces the Nepalese framework, in section three the different options in terms of types of seed sources are defined and discussed, and some of the more specific details related to the establishment of planted seed sources are discussed in the final section.