Sphagnum moss is a type of moss that grows in boggy or wet areas, such as swamps or marshes. It is typically found in cool or temperate regions and is well-known for its unique water-retaining capabilities. Sphagnum moss can hold up to 20 times its weight in water, making it a popular choice for horticulture and gardening. It is commonly used as a soil amendment to improve moisture retention and aeration, as well as a growing medium for certain types of plants, such as carnivorous plants and orchids. Additionally, sphagnum moss is often used in the production of peat moss, which is commonly used as a soil amendment and mulch in gardening and agriculture.