You can buy ( Garcinia mangostana ) through specialized tropical plant nurseries, either online or at physical locations in tropical regions like Florida or Southeast Asia. Because these trees are ultra-tropical and slow-growing, they are often sold as young seedlings or grafted saplings. Online Retailers & Marketplaces

Amazon.com: Mangosteen Tree Live Plants. Up to $10. $35 & above. Get It Fast. Amazon.com Mangosteen Tree - Etsy

: Frequently lists live seedlings, though availability can be seasonal.

: A primary source for various mangosteen types, including grafted trees (which fruit faster) and starter plants.