Trewidden Garden
Trewidden, near Penzance, Cornwall
A sheltered Cornish garden two miles west of Penzance, known for its Tree Fern Dell planted in an old opencast mine, along with camellias and magnolias.
Visit information checked 22 October 2026
Garden UK guide
Why visit Trewidden Garden?
Trewidden is a classic west Cornwall woodland garden, and its stand-out feature is the Tree Fern Dell. Thomas Bedford Bolitho planted an old opencast tin mine with tree ferns imported from Australia, and the result has been described as the best stand of tree ferns in the northern hemisphere. Walking among the arching fronds feels very far from the rest of Britain.
Away from the dell, the garden is a sheltered woodland setting with camellias and magnolias, the plants that make Cornish gardens so special in spring. The mild climate near Land's End allows tender plants to thrive, and the mix of tree ferns, flowering shrubs and old trees gives a different mood in each part of the walk. The garden has opened for the National Garden Scheme, a sign that the owners welcome keen gardeners.
For gardeners, Trewidden shows how a difficult piece of ground, in this case an old mine pit, can become the best part of a garden when the right plants are chosen. Tree ferns need shelter and moisture, and the dell provides both. If you grow tree ferns at home, look at how they are spaced and how the canopy above keeps them shaded and damp. Camellias and magnolias, too, show how evergreen and deciduous shrubs can be mixed to give both winter shelter and spring colour. Sturdy shoes help on damp paths.
What to see
- The Tree Fern Dell, planted with Dicksonia antarctica in an old opencast mine.
- Camellias flowering in the sheltered woodland in early spring.
- Magnolias, one of the great sights of Cornish spring gardens.
- Old woodland trees giving shelter to tender plants.
Trewidden Garden through the year
- spring
- Camellias and magnolias in flower make this the main season.
- summer
- The Tree Fern Dell is lush and cool, with fresh fronds unfurling.
- autumn
- Tree ferns and evergreen shrubs keep the garden green; check opening before visiting.
- winter
- Opening is likely to be limited; check the latest information before you travel.
The story behind the garden
Trewidden was the family home of the Bolithos, Cornish bankers and industrialists. Thomas Bedford Bolitho, MP for St Ives from 1887 to 1900, continued his father's work in the garden, and in particular filled the old opencast mine with tree ferns, Dicksonia antarctica, newly imported from Australia. This became the Tree Fern Dell.
After the death of her husband in 1955, Bolitho's daughter, Mary Williams, returned to Trewidden and took over the garden. When she died, the property passed to her cousin Alverne Bolitho, who has developed it into a popular attraction for visitors.
Plan your visit
- Best for
- Visitors to west Cornwall who love tree ferns, camellias and sheltered woodland gardens.
- Getting there
- Trewidden is about two miles west of Penzance in the far west of Cornwall.
- Before you go
- Opening days are seasonal, and paths through the dell can be damp. Check the garden's own listings or the National Garden Scheme for current opening times and tickets.
Source: Wikipedia: Thomas Bedford Bolitho (Trewidden Gardens)
Questions about visiting Trewidden Garden
What is Trewidden Garden known for?
Trewidden is known for its Tree Fern Dell, where Thomas Bedford Bolitho planted an old opencast mine with tree ferns from Australia. It has been described as the best stand of tree ferns in the northern hemisphere.
Where is Trewidden Garden?
Trewidden is about two miles west of Penzance in west Cornwall. Check the garden's own listings for exact directions, as some map searches give wrong addresses.
When is the best time to visit Trewidden?
Spring is the best time for camellias and magnolias, the classic Cornish garden shrubs. The Tree Fern Dell looks good from spring through summer, when new fronds unfurl.
Who owns Trewidden Garden?
Trewidden belongs to the Bolitho family. Mary Williams, daughter of Thomas Bedford Bolitho, ran the garden after 1955, and her cousin Alverne Bolitho inherited and opened it up to more visitors.
Garden features
Location
Trewidden, near Penzance, Cornwall
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