Trengwainton (Cornish: Tredhigwenton, meaning farm of eternal springtime)[1] is a garden situated in Madron, near Penzance, Cornwall, England, UK, which has been in the ownership of the National Trust since 1961.

The garden is noted for its collection of exotic trees and shrubs and offers views over Mount's Bay and The Lizard.

[3] The walled garden, which was built in Elizabethan times, seems to have been constructed as a response to the period of persistently cooler weather known as the Maunder Minimum.

Trengwainton was sold following the loss of income resulting from the 1833 Emancipation Act which freed slaves on the family's Worthy Estate in Jamaica.

The Victoria Medal of Honour for Horticulture was awarded to Edward in 1961 and in the same year he donated 98 acres to the National Trust,[6] who also acquired the house, "with provision for the family to remain in residence"[5][7] Held bi-annually, each Easter Monday and August Bank Holiday, from 1946 until 1974, the Trengwainton Speed Hill Climb (grid reference SW443311) was an event organised by the West Cornwall Motor Club.