Indigo plants are flowering plants belonging to the genus Indigofera, primarily known for their ability to produce a natural blue dye called indigo. This dye has been used for centuries in textiles, making it a significant crop in various cultures around the world. The most common species used for dye production is Indigofera tinctoria. These plants thrive in warm climates and are typically found in tropical and subtropical regions. Indigo plants can grow as shrubs or small trees, reaching heights of up to 1.5 meters. They have compound leaves and small, pink or purple flowers that attract pollinators, contributing to their ecological importance.