Tregren, formerly known as IndoorGarden, is a Finnish high-tech company specializing in the development and production of ecological, contemporary gardens based on Active Growing Technology.

Tregren is convinced that food production is constantly moving closer to the consumer. The aim is to develop and manufacture consumer products for urban gardening: indoor gardens and kitchen gardens. Tregren's indoor gardens represent contemporary Nordic design, where functionality and design combine to create solid, intelligent consumer products.

Founded in Finland in 2010, Tregren's first product, the Herbie indoor garden, was introduced at the Habitare design fair in Helsinki in September 2010. Herbie is the first second-generation hydroponic device that lets you grow plants from seed, or use pots of herbs bought in any supermarket. Since their launch, they have sold over 20,000 Herbie indoor gardens.