Every year, in May, we take to the West side of London to admire the creations of some of the best horticultural creatives that come together to showcase amazing works of floral art that burst with colour and creativity. Here are our top three flower festivals taking place this month. In May, London comes into full bloom, with streets, gardens and neighbourhoods transformed into vibrant celebrations of colour, creativity and seasonal beauty.
From world-renowned garden showcases to free floral trails across some of the city’s most elegant districts, there are countless ways to experience London at its most alive. Whether you’re planning a spring day out, a relaxed weekend stroll or simply looking for things to do in London in May, these garden festivals offer a perfect mix of nature, design and discovery.
RHS Chelsea Flower Show
The RHS Chelsea Flower Show 2026 returns to the grounds of the Royal Hospital Chelsea from 19 to 23 May, bringing together some of the world’s leading garden designers, florists and horticultural experts. Known the world’s most famous flower show, this event continues to shape global garden trends since 1913. This year the show celebrates the lift of the gnome ban with gnomes decorated by celebrities and used to raise funds for the RHS Campaign for School Gardening. Visitors can expect immersive show gardens, striking floral installations and thoughtfully designed spaces that explore themes such as sustainability, wellbeing and biodiversity. It’s an inspiring experience for garden lovers, design enthusiasts and anyone curious about the future of green spaces.
If you are not one to battle the crowds (this event is very busy) the BBC coverage of the event offers all the necessary detail.
Chelsea in Bloom
Running alongside the Chelsea Flower Show (18 – 24 May), Chelsea in Bloom 2026 transforms the surrounding streets into a free open-air floral festival. Local shops, restaurants and hotels collaborate to create large-scale installations, turning Chelsea into one of the most colourful destinations in London during May.
This year’s theme, “Out of This World”, brings a playful and imaginative twist, with displays inspired by space, exploration and creativity. Perfect for a spring walk around Sloane Square and King’s Road, it’s one of the best free things to do in London during the season. The dazzling zodiac constellation in Sloane Square, a UFO landing on Pavilion Road and the immersive lunar landscape at Duke of York Square are just few of the highlights from this year’s free festival of floral displays in Chelsea.
Belgravia in Bloom
Just a short walk away, Belgravia in Bloom 2026 offers a more intimate and story-led floralexperience. Taking place from 18 to 24 May, this free festival transforms streets such as Elizabeth Street and Motcomb Street into beautifully curated displays inspired by this year’s theme, “Fairy Tales in Belgravia.”
Expect charming installations, detailed floral designs and a slightly quieter atmosphere,
making it ideal for those looking to explore a different side of London’s spring events. This is a wonderful way to discover hidden corners of the city while enjoying the season in full bloom.
Whether you’re planning a spring day out, a relaxed weekend stroll or simply looking for things to do in London in May, these flower festivals offer a perfect mix of nature, design and discovery.
For more ideas of things to do with the kids visit our events and activities area which provides details of free events and special offers in London’s finest venues and lots more.