Trebah (Cornish: Tre Worabo, meaning Gorabo's farm) is a 26-acre (110,000 m2) sub-tropical garden situated in Cornwall, England, UK, near Glendurgan Garden and above the Helford River (grid reference SW767273). Part of the parish of Mawnan, the gardens are set within an area of the same name, which includes the small settlements of Trebah Wartha and Trebah Woolas (both are of medieval origin).
In 1831 Trebah was acquired by the Fox family who built Glendurgan Garden. Trebah was first laid out as a pleasure garden by Charles Fox, a Quaker polymath of enormous creative energy who paid meticulous attention to the exact positioning of every tree. His son-in-law, Edmund Backhouse, M.P. for Darlington, took the work further.
In 1907 Trebah was bought by Charles Hawkins Hext and inherited on his death in 1917 by his wife, Alice, who died in 1939. From 1939 to 1981 the garden fell into decline, since the substantial Trebah Estate was sold off in small packages, of which the house and garden was one.
During the Second World War, Trebah was used for military purposes and the assault on Omaha Beach in Normandy was launched from Polgwidden Beach, at the foot of Trebah Garden.
One of the subsequent owners was Donald Healey, the motor car designer, who removed some of the concrete military structures and provided a boathouse on the beach.
In 1981, on their 64th birthday,Tony and Eira Hibbert bought Trebah as their retirement home. They were persuaded to give up the first three years of retirement to restore the garden.