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South West England

Caerhays Castle Gardens

Caerhays Castle, St Michael Caerhays, near St Austell, Cornwall

A large woodland garden behind John Nash's Caerhays Castle on the south Cornish coast, famous for spring magnolias, camellias and rhododendrons and home to a National Collection of magnolias.

Visit information checked 22 October 2026

Garden UK guide

Why visit Caerhays Castle Gardens?

Caerhays is one of the great Cornish spring gardens, and it is worth timing a trip around it. The garden covers over 140 acres of woodland on the slopes behind John Nash's castle, and in spring the magnolias, camellias and rhododendrons flower high above the paths, often against a bright sea sky over Porthluney Cove.

Signposted walks of different lengths lead up through the woods, so you can choose a short loop or spend hours exploring. The magnolias are the headline act and are recognised by Plant Heritage as a National Plant Collection, but the camellias and rhododendrons are just as important to the garden's story, many of them grown from seed brought back from China by plant hunters in the early twentieth century. There are also champion trees, and visitors often comment on how the paths use the steep ground to give views into the flowering canopy. Back near the castle you will find the Magnolia Tea Rooms and gift shop, open while the gardens are open, and guided castle tours run during the season. Porthluney Beach is a short stroll away, with a beach café, and dogs are welcome on the beach all year.

For gardeners this is a lesson in what a sheltered, mild valley can grow. Note how the tallest shrubs are given room to become trees and how paths are cut across slopes. The paths are steep in places, so wear good shoes.

What to see

  • The National Collection of magnolias, flowering high in the woodland canopy.
  • Camellias and rhododendrons, many linked to early twentieth-century plant hunting in China.
  • Signposted woodland walks of varying length across the slopes.
  • Views down to John Nash's castle and Porthluney Cove.
  • Champion trees among the woodland planting.

Caerhays Castle Gardens through the year

spring
The peak, with magnolias, camellias and rhododendrons in flower from the garden's reopening in late winter onwards.
summer
The garden is best viewed in spring and normally closes after the main season; the coast path and beach remain nearby.
autumn
The gardens are closed, though the estate's coastal walks and beach are still open to explore.
winter
The gardens are closed in winter and reopen in February; check the official site for the season dates.

The story behind the garden

The Trevanion family held Caerhays from the fourteenth century, and John Bettesworth-Trevanion built the present castle between 1807 and 1810 to designs by John Nash. Debts forced him to leave, and in 1854 Michael Williams bought the estate from his creditors. It has been in the Williams family since.

John Charles Williams, who inherited in 1880, became a keen plantsman and sponsored plant-hunting expeditions to fill the garden. Seeds collected in China by Ernest Wilson in 1903 were given to him by Harry Veitch. By 1917 the garden held over 250 kinds of rhododendron. The Williams family has kept a daily garden diary since 1897, and today the magnolias are recognised as a National Plant Collection. The castle is a family home and the gardens open each spring.

Plan your visit

Best for
Plant lovers and photographers who want to see one of Cornwall's great magnolia and camellia gardens in spring.
Getting there
Caerhays is on the south Cornish coast in the Porthluney valley, between St Austell and Truro; the official site has driving directions from the A30.
Before you go
Paths are steep in places, so allow time and wear sturdy shoes. The gardens open only in the spring season, so check the official website for current dates, times and tickets.

Source: Caerhays Estate visitor information

Questions about visiting Caerhays Castle Gardens

When is Caerhays Castle Garden open?

Caerhays is a spring garden. It opens in February and closes after the main flowering season, and it is closed through the autumn and winter. Check the official website for this year's dates.

What is Caerhays famous for?

Caerhays is famous for magnolias, camellias and rhododendrons. Its magnolias are a National Plant Collection, and the garden was filled with plants from early twentieth-century expeditions to China sponsored by J.C. Williams.

Can you take dogs to Caerhays?

Porthluney Beach, a short walk from the castle, welcomes dogs all year round, which suits a dog walk before or after. Check the official website for the current rules on dogs in the garden itself before you visit.

How big is the garden at Caerhays?

The official site describes the garden as covering over 140 acres of traditional woodland garden. Signposted walks of different lengths let you choose how much of it to see.

Is there a café at Caerhays?

Yes. The Magnolia Tea Rooms and gift shop are open while the gardens are open, and there is also a beach café on Porthluney Beach, a short stroll away.

Garden features

Woodland Spring Interest

Location

Caerhays Castle, St Michael Caerhays, near St Austell, Cornwall

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