The park preserves one of the largest remaining freshwater swamp forests in eastern Thailand.
The dominant vegetation, Melaleuca cajuputi (paperbark tree), is highly resistant to both waterlogging and fire.
The garden maintains a dedicated center for the collection and preservation of rare plant species native to the Rayong region.
The wetland area changes significantly with the tide, which influences how far into the swamp forest boats can travel.
The park was developed specifically to serve as a hub for botanical research and educational tourism in the Klaeng District.
Rayong Botanical Garden is a 3,800-rai conservation area designed to protect Thailand's rare eastern wetland ecosystems. The park centers on the Bueng Samet wetland, which features a massive swamp forest of paperbark trees, known locally as Samet Khao. Visitors navigate the primary wetland areas by renting kayaks or flat-bottomed boats to access the shallow canals. The site hosts an herbarium and a living collection focusing on indigenous aquatic flora and rare plant species. Elevated wooden boardwalks traverse sections of the marshland, allowing for ground-level exploration of the aquatic environment. The garden functions as a research center for plant genetic conservation in Rayong Province.
The reflection of the paperbark trees against the still water of the swamp forest, best captured from a kayak.
Rent a kayak early in the morning to avoid the strongest heat and to see more active birdlife.
Bring mosquito repellent, as the humid wetland environment attracts insects.
Check with the visitor center upon arrival regarding water levels, as certain interior forest paths may be inaccessible during extreme dry spells.
Avoid visiting during the height of the midday sun, as there is limited shade once you leave the forest canopy.
Avoid picking plants or disturbing wildlife; remain on designated boardwalks or paths to prevent trampling fragile vegetation.
