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Partner Garden
Free access for RHS members at selected times

London Road

Between Brentford & Isleworth, north bank of Thames. TW8 8JF (pedestrian entrance), TW7 6AZ (vehicle entrance).

40 acres

020 8560 0882

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 for joint memberships) applies when open.


  • Assistance dogs only
  • Accessible facilities
  • Accessible garden
  • Baby changing facilities
  • Children’s play area
  • Children's activities
  • Free carer entry
  • Gift shop
  • Group rates
  • Parking
  • Picnic area
  • Refreshments
  • Toilets


  • Arboretum
  • Champion trees
  • Glasshouse (open to public)
  • Pond or lake
  • Woodland

About the garden

Owned by
The Duke of Northumberland

Designed By
Capability Brown

By far the most outstanding feature at Syon is the Great Conservatory, designed by Charles Fowler and built by the 3rd Duke of Northumberland between 1820 and 1827. It is a glass palace of extraordinary size and beauty, with curving wings leading out to smaller glasshouses at either side. Tree ferns and cacti are among its larger inhabitants. In front is a formal garden of clipped yews and grass dating from the 1830s.

But one of the nicer aspects of Syon is the way the water meadows along the banks of the Thames are still grazed by cows: it creates a unique rural prospect so close to the heart of London. There are fine trees, too, the relic of a botanical collection dating back to the 1820s: some, including four species of oak, are record-breakers.

Plants of special interest

  • Agapanthus
  • Alliums
  • Bluebells
  • Cacti & succulents
  • Camellias
  • Conifers
  • Cornus (for winter stems or spring bracts)
  • Daffodils
  • Ferns
  • Fruit bushes/trees
  • Fuchsias
  • Grasses
  • Hellebores
  • Hemerocallis
  • Hostas
  • Irises
  • Laburnum
  • Lavender
  • Magnolias
  • Maple
  • Rhododendrons/azaleas
  • Shade-loving plants
  • Snowdrops
  • Spring bulbs
  • Topiary
  • 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.