A potting shed is a small structure used for gardening tasks such as sowing seeds, planting and storing gardening equipment. Synonyms for potting shed include greenhouse, plant nursery, garden shed, potting house and hothouse. A greenhouse is a glass or plastic structure designed to trap heat and provide an environment suitable for the growth of plants. A plant nursery refers to a place for the propagation and cultivation of plants. A garden shed is a garden building for storing garden tools and equipment. A potting house is a building used for potting plants. A hothouse is a structure for growing plants in which the temperature, humidity, and light can be regulated.