A nursery is a place where plants are propagated and grown until they are ready to be planted elsewhere. There are different types of nurseries depending on factors like the planting material used, irrigation needs, and intended duration. Permanent nurseries are maintained long-term to meet regeneration needs, while temporary nurseries are set up as needed. Nurseries can help with artificial regeneration on degraded sites by providing healthy seedlings adapted to local conditions. They allow for commercial production and introduction of exotic species that do not establish well directly from seed.