William and Harry honor their mother at memorial garden | CNN

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LONDON, ENGLAND - AUGUST 30: (L-R) , Prince William, Duke of Cambridge and Prince Harry are seen during a visit to The Sunken Garden at Kensington Palace on August 30, 2017 in London, England. The garden has been transformed into a White Garden dedicated in the memory of Princess Diana, mother of The Duke of Cambridge and Prince Harry. (Photo by Kirsty Wigglesworth- WPA Pool/Getty Images)

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(CNN) —

Princes William and Harry have visited a new garden dedicated to their mother on the eve of the 20th anniversary of her death.

The pair were accompanied on Wednesday afternoon by Prince William’s wife, Catherine, the Duchess of Cambridge, as they toured what had been known as the Sunken Garden at Kensington Palace in London, to mark two decades on from the death of their mother Diana, Princess of Wales.

“The engagement will allow the Princes to pay tribute to the life and work of their mother the day before the twentieth anniversary of her death,” an earlier statement from Kensington Palace said.

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Kirsty Wigglesworth/AP

William, Harry and Catherine arrive at the White Garden at Kensington Palace, Princess Diana's home for 15 years, in London on Wednesday. The garden was planted to mark 20 years since her death.

Diana died in a car accident in Paris on August 31, 1997, leaving behind her sons then aged 15 and 12 years old, as well as a philanthropic legacy that won her admirers the world over. She divorced her husband Charles, Prince of Wales, in 1996.

The White Garden is the result of a transformation that features several of the late princess’s favorite plants and was inspired by her work, image and style, including her famous white “Elvis” Catherine Walker dress.

Open since spring this year, the garden contains white roses, lilies, gladioli and cosmos flowers. The transformed garden will continue into September.

Kirsty Wigglesworth/AP

Princes William and Harry paid tribute to their mother on the eve of the 20th anniversary of her death by visiting the Sunken Garden to honor her work with charities.

The princes toured the garden, alongside the head gardener and another gardener who knew the Princess of Wales, before meeting representatives from several of the organizations Diana supported in the final years of her life as well several charities that she had a close relationship with.

Those attending the engagement in the White Garden included people from the UK’s homeless charity Centrepoint, the National AIDS Trust, Great Ormond Street Hospital, the Leprosy Mission and the Landmine Survivors Network.

The royals invited them so they could hear about the impact of their mother’s work, according to the official Kensington Palace Twitter account.