London’s largest free flower show returns on Monday 18th May 2026, transforming the streets of Belgravia and Chelsea into an open-air gallery of elaborate floral displays that will remain on show until Sunday 24th May. The twin events – Chelsea in Bloom and Belgravia in Bloom – run alongside the ticketed RHS Chelsea Flower Show and require no ticket or booking, allowing anyone to wander through the neighbourhoods and admire the installations free of charge.
More than 130 businesses are expected to participate in Chelsea in Bloom alone, with organisers anticipating over 140 this year. Produced by Cadogan in association with the Royal Horticultural Society, Chelsea in Bloom clusters its displays around Sloane Square, King’s Road, Duke of York Square, Pavilion Road and Sloane Street. Belgravia in Bloom, organised by the Grosvenor Estate and first conceived in 2016 to extend the floral celebration beyond the paid show, spreads its installations more widely through Elizabeth Street, Eccleston Yards, Motcomb Street and Pimlico Road. Visitors are advised to allow two to three hours to see Chelsea’s displays, and to collect maps from both event websites beforehand – though previous visitors have found the maps unhelpful and recommend combining them for better navigation.
Themes for 2026
Each year the events adopt separate themes, and for 2026 Chelsea in Bloom takes “Out of This World”, exploring intergalactic wonders, space travel, astrology and spiritual symbolism. Cadogan has commissioned several large-scale installations: a floral zodiac constellation in Sloane Square, a suspended UFO on Pavilion Road, a lunar landscape and Saturn display at Duke of York Square, a mythical floral dragon and a Pegasus on Sloane Street, and an enormous floral globe on King’s Road honouring Sir David Attenborough’s 100th birthday. Belgravia in Bloom opts for “Fairy Tales of Belgravia”, a theme designed to evoke magic, nostalgia and otherworldly charm, with installations reflecting spring, summer, autumn and winter.
The displays are judged competitively: RHS judges and lifestyle judges award Gold, Silver, Bronze and Merit certificates, while the public can vote for a “People’s Champion” award. Sustainability has become a growing focus, particularly in Belgravia, where the RHS has introduced sustainable judging criteria. Participating businesses are using British-grown flowers, peat-free compost, recycled materials, dried flowers and foliage, and are repurposing displays after the event. Some installations incorporate native wildflowers and waste products from woodland thinning.
The flower sale opportunity
A separate but connected attraction awaits those who visit on Saturday 23rd May. That afternoon, the RHS Chelsea Flower Show at the Royal Hospital Chelsea closes its gates, and at 4pm many of the plants and flowers that have filled the show gardens and stands go on sale to attendees inside. The result, visible from Chelsea Bridge Road, is a spectacle in itself: hundreds of ticket-holders staggering away with huge bundles of blooms, creating what one observer described as a “floral conclusion to Macbeth”.
The sell-off is not open to the general public – only those who have paid for entry to the RHS Chelsea Flower Show can purchase plants – but the scene on the surrounding streets is free to watch. Public tickets for the main show, which runs from Tuesday 19th May to Saturday 23rd May, start at £56.65, with members’ days on 19th and 20th May and public days from 21st to 23rd May.
For those who simply want to enjoy the free displays, the combination of Chelsea in Bloom and Belgravia in Bloom offers a week-long opportunity to see everything from small window arrangements to sprawling floral confections that spill out of shop fronts. Many of the participating retailers – high-end boutiques such as Ralph Lauren, RIXO and Brunello Cucinelli in Chelsea, and Peggy Porschen, Neill Strain Floral Couture and Catherine Best in Belgravia – use the events to showcase their creativity, while cafes and restaurants offer special floral-themed menus. The nearest tube stations are Sloane Square for Chelsea, and Victoria, Knightsbridge or Sloane Square for Belgravia, with numerous bus routes serving both areas and some streets in Belgravia pedestrianised during the festival.
