Indonesia is one of the world's largest growers of teak (Tectona grandis), with an estimated 1.7 M ha of teak plantations accounting for about 31% of the global plantation resource of teak, 5.7 M ha. This national teak resource supports an export furniture industry worth over US$1.8 billion annually. Up to 3.1 million households are involved in teak growing through farm forestry operations. Teak has a long history as an exotic plantation species in Indonesia, where it is believed to have been introduced some 800 years ago. For over 400 years, teak has been grown in intercropping systems in South-East Sulawesi where it is a common part of local farming systems.