Good nursery management involves many skills and attention to detail. The process starts with acquisition of high-quality germplasm of known origin (accession records) and recorded genetic quality, supported by documents recognizing the rights of the supplier (Access and Benefit Sharing agreements)—sees for example the Agro forestry Tree Genetic Resources Strategy of the World Agro forestry Centre Furthermore, this germplasm must have been appropriately stored and handled to avoid loss of viability. Germplasm can be of two types: seeds and vegetative prop gules. Seeds also are of two main types: those that can be stored by drying or freezing (orthodox), and those that cannot (recalcitrant). Both the latter and the vegetative prop gules are short-lived (from a few days to at most a few weeks). They have to be very carefully and rapidly handled to avoid water or temperature stress and any physical damage.