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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

10am–6pm (summer), 10am–4pm (winter), daily, except 25 and 26 Dec.


Please see website for admission prices.

RHS members

Free access (member 1 only for joint memberships) applies when open.


  • Accessible facilities
  • 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)
  • Herbaceous border
  • Mediterranean/Italian garden

About the garden

Owned by
National Trust/Lizzie Smith Jones

Designed By
Thomas Mawson

A peaceful oasis on the outskirts of Cardiff, Dyffryn Gardens covers more than 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, a croquet lawn and calming water features. There is also a large glasshouse, statuary collection and arboretum featuring trees from all over the world as well as a 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 is Dyffryn House, a grand Victorian mansion, currently closed to the public as it undergoes serious restoration work. As of summer 2022, the house will be under scaffolding for around 10 months.  

Just 20 minutes from the centre of Cardiff, Dyffryn is full of secret spaces and horticultural surprises as well as free parking, a café, a shop and two play areas. Please see our website for seasonal events and celebrations.

Please note: This garden is partially accessible.

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.