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Partner Garden
Free access for RHS members at selected times

St Nicholas
Vale of Glamorgan

M4, Jct 33 on A48 then follow signs.

55 acres

02920 593328

Visit website

Opening Hours

Please see website for opening dates and times.


Please see website for admission prices.

RHS members

Free access (Member 1 only) - applies when open.


  • Accessible facilities
  • Accessible garden
  • Baby changing facilities
  • Children’s play area
  • Children's activities
  • Dogs welcome
  • Free carer entry
  • Gift shop
  • Group rates
  • Parking
  • Picnic area
  • Plant sales
  • Refreshments
  • Toilets


  • Arboretum
  • Glasshouse (open to public)
  • Gravel garden
  • Herbaceous border
  • Mediterranean/Italian garden
  • Pond or lake
  • Prairie/naturalistic planting
  • Sub-tropical garden
  • Wildflower meadow
  • Wildlife planting and features

About the garden

Owned by
National Trust

Designed By
Thomas Mawson

A peaceful oasis on the outskirts of Cardiff, Dyffryn Gardens covers more than 22.2 hectares (55 acres). The Edwardian gardens are a restoration project on a path to excellence. With year-round seasonal highlights, the gardens feature the best woody collection in the National Trust. Discover intimate garden rooms including the Pompeiian garden, Paved Court, Reflecting Pool and Mediterranean garden. The enormous great lawn is bordered by seasonal bedding and a croquet lawn. There is also a large glasshouse, statuary collection and arboretum featuring trees from all over the world as well as the Log Stack play area, which is great for kids and adults alike. 

Designed by eminent landscape architect Thomas Mawson in 1906, the gardens are the early 20th-century vision of coal magnate John Cory and his son Reginald. Within the gardens, Dyffryn House, a grand Victorian mansion, overlooks the key aspects of the garden but is closed to the public.

Plants of special interest

  • Agapanthus
  • Alliums
  • Alpines
  • Asters
  • Autumn bulbs
  • Begonias
  • Bluebells
  • Cacti & succulents
  • Camellias
  • Conifers
  • Cornus (for winter stems or spring bracts)
  • Cut flowers
  • Cyclamen
  • Daffodils
  • Dahlias
  • Ferns
  • Fruit blossom
  • Fruit bushes/trees
  • Grasses
  • Hellebores
  • Hostas
  • Irises
  • Lavender
  • Magnolias
  • Maple
  • Orchids
  • Primulas
  • Rhododendrons/azaleas
  • Roses
  • Shade-loving plants
  • Snowdrops
  • Spring bulbs
  • Sweet peas
  • Vegetables
  • Waterlilies
  • Wildflowers
  • Wisteria

Get involved

The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.