In pictures: Behind the scenes of this year's Chelsea Flower Show

Queen Elizabeth II and Catherine, Duchess of Cambridge visits the RHS Chelsea Flower Show, it is the most prestigious flower and landscape gardens show in London, England.
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Varieties of flowers on display at the Chelsea Flower Show in London, England. The prestigious Chelsea Flower Show, held annually since 1913 in the Royal Hospital Chelsea grounds, is open to the public from the 23rd to the 27th of May, 2017. (Getty Images)
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Queen Elizabeth II visits the RHS Chelsea Flower Show press day at Royal Hospital Chelsea in London, England. The prestigious Chelsea Flower Show, held annually since 1913 in the Royal Hospital Chelsea grounds, is open to the public from the 23rd to the 27th of May, 2017. (Getty Images)
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Catherine, Duchess of Cambridge (C) reacts as she views a display of David Austin roses at the RHS Chelsea Flower Show press day at Royal Hospital Chelsea in London, England. The prestigious Chelsea Flower Show, held annually since 1913 in the Royal Hospital Chelsea grounds, is open to the public from the 23rd to the 27th of May, 2017. (Getty Images)
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A woman wearing an outfit decorated with flowers poses at the Chelsea Flower Show in London, England. The prestigious Chelsea Flower Show, held annually since 1913 in the Royal Hospital Chelsea grounds, is open to the public from the 23rd to the 27th of May, 2017. (Getty Images)
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'Panda's' are pictured in the 'Chengdu Silk Road Garden' at the 2017 Chelsea Flower Show in London. The Chelsea flower show, held annually in the grounds of the Royal Hospital Chelsea, opens to the public on May 23. (BEN STANSALL/AFP/Getty Images)
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A Mexican band play in the 'Beneath the Mexican Sky Garden' at the Chelsea Flower Show in London, England. The prestigious Chelsea Flower Show, held annually since 1913 in the Royal Hospital Chelsea grounds, is open to the public from the 23rd to the 27th of May, 2017. (Getty Images)
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The 'Chengdu Silk Road Garden' on display at the Chelsea Flower Show in London, England. The prestigious Chelsea Flower Show, held annually since 1913 in the Royal Hospital Chelsea grounds, is open to the public from the 23rd to the 27th of May, 2017. (Getty Images)
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The 'The Poetry Lover's Garden' on display at the Chelsea Flower Show in London, England. The prestigious Chelsea Flower Show, held annually since 1913 in the Royal Hospital Chelsea grounds, is open to the public from the 23rd to the 27th of May, 2017. (Getty Images)
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The Breast Cancer Now Garden: Through the microscope, is seen at the 2017 Chelsea Flower Show in London. The Chelsea flower show, held annually in the grounds of the Royal Hospital Chelsea, opens to the public on May 23. (BEN STANSALL/AFP/Getty Images)
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The 'Royal Bank of Canada Garden' on display at the Chelsea Flower Show in London, England. The prestigious Chelsea Flower Show, held annually since 1913 in the Royal Hospital Chelsea grounds, is open to the public from the 23rd to the 27th of May, 2017. (Getty Images)
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The 'Chris Evans Taste Garden' on display at the Chelsea Flower Show in London, England. The prestigious Chelsea Flower Show, held annually since 1913 in the Royal Hospital Chelsea grounds, is open to the public from the 23rd to the 27th of May, 2017. (Getty Images)
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The ''500 Hundred Years of Covent Garden' Sir Simon Milton Foundation Garden' on display at the Chelsea Flower Show in London, England. The prestigious Chelsea Flower Show, held annually since 1913 in the Royal Hospital Chelsea grounds, is open to the public from the 23rd to the 27th of May, 2017. (Getty Images)