Why greenhouse is called green why not redhouse or something else?

The term "greenhouse" refers to the color green, which is commonly associated with plants and nature. The design of a greenhouse typically includes glass or transparent materials that allow sunlight to enter, promoting plant growth. While other colors could theoretically be used, "greenhouse" has become the standard term due to its connection to gardening and the cultivation of green plants. The name reflects the primary purpose of the structure: to create an environment conducive to growing greenery.