The Department of Internal Trade expects 2026 southern mangosteen output of about 139,000 tonnes, up roughly 75% from 2025. It plans to collect 10,000 tonnes through 3 auction sites (2 in Nakhon Si Thammarat from 17 Aug to 20 Sep 2026, 1 in Chumphon from 20 Aug to 20 Sep 2026) and to route produce through Talad Thai, Si Mum Mueang and Moraket markets plus six Modern Trade chains with over 200 branches. Traders buying or supplying mangosteen, durian or longan from the south may find cheaper supply and new buyer channels this season; sellers can register produce for the auctions.