A sneak peak at Chelsea Flower Show - The Royal Horticultural Society's Chelsea Flower Show is open from May 22 to 26 and provides a world-class showcase of innovative garden design and horticulture. Take a look at these behind-the-scenes photos.

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Themes - The RHS states that this year's key themes are "The important role that gardening and growing plants can play in tackling some of the biggest issues facing us today."

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Havens - The organisation states that "Designs will celebrate how gardens can be beautiful havens to escape and enjoy, bringing a sense of normality to fractured lives, as well as how they can help tackle major environmental issues."

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Guests - The Prime Minister, Teresa May, and her husband take a look before the crowds, on May 21.

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Finishing touches - A worker dusts a rebutia cactus.

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Watering - A worker waters flowers in preparation for the five-day event.

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Impact - Sue Biggs CBE, Director General of the RHS says: “It is fantastic to see the gardens at this year’s RHS Chelsea Flower Show reminding us all of the power of plants and the huge impact gardening and green spaces can have on so many aspects of our lives.”

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Urban gardens - This year's event debuts Space to Grow gardens. These displays focus on smaller, urban gardens and include ideas on how to make the most of spaces that are typical of a town garden.

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Extended hours - This year also sees an extension to the opening times on the Friday of the show. The event is open 8 am to 8 pm on Tuesday, 22 May to Friday, 25 May, and from 8 am to 5.3 0pm on Saturday, 26 May.

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Twilight - The Chelsea Late Event will take place on Friday evening. The RHS describes it as a vibrant evening with bands, an artisan food market and wandering artists, as well as a chance to enjoy the Artisan Gardens by twilight.

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Preparations - Workers move flowers in preparation for the RHS Chelsea Flower Show in London on May 20.

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Guests - TV presenters Holly Willoughby and Phillip Schofield take a tour of the gardens on May 21.

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Perfect - A variety of chrysanthemums on display.

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Maintenance - A worker waters a display in preparation for the public.

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Daffodils - A display of daffodils in progress ahead of opening day.

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History - The RHS Chelsea Flower Show has been held in the grounds of the Royal Hospital Chelsea, in London, since 1912.

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Attendance - The show is traditionally attended by members of the royal family, politicians, and visitors from around the world.

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Trend-setting - The show has become a venue to launch new plants and revitalise older varieties of plants. Key garden trends are revealed here each year.

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Plant sale - Each year at 4 pm on the last day of the show, display plants are sold off.

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Show gardens - This year's event features 10 show gardens. The RHS states that these include a romanticised 18th century English tea garden, a timeless recreation of a Mediterranean landscape, a blueprint for city living in contemporary apartments, and a garden inspired by the resilience and determination of those living in forced migration.

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Exotic - A worker adjusts a peacock-themed display before the doors open.

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Flowers galore - The Great Pavilion hosts a display of flowers from more than 90 of the world’s best nurseries, growers, and florists, according to the RHS.

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Artisan gardens - In addition to the 10 show gardens, there are 16 artisan gardens around a variety of themes.

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Embroidered Minds - Embroidered Minds is one of the artisan gardens. The collaboration between writers, artists, doctors, and historians explores the effects of epilepsy,

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Embroidered Minds - The garden represents different states of a seizure. The RHS describes the three areas: The pre-seizure area is calm and sedate with green and white planting and valeriana officinalis, which was one of the first epilepsy drugs. An oak bench, tiled path, and foreground garden are interrupted by dramatic, harsh, brown planting, representing a seizure.

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Embroidered Minds - The planting beyond is more vivid, with bright yellows and oranges, blue aquilegia, and white peonies, associated with the possible heightening of the senses post-seizure.

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Windrush - Baroness Benjamin, former TV presenter and a patron of the Windrush Foundation, created a display with Birmingham City Council to recognise and celebrate the legacy of the Windrush Generation.

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Guests - TV presenter Nicki Chapman visits the show in an appropriately floral dress.

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