Prince William and Prince Harry Tour in Honor of Princess Diana

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The gardens at Kensington Palace became a tribute to Princess Diana, and her sons, Prince William and Prince Harry, are finally ready to unveil the finished product in time for the 20th anniversary of her mother's tragic death.

The two royal brothers, along with Kate Middleton, made a tour of the White Garden on Wednesday (so called because all 1200 onions wear white and cream flowers). After city and countryside, home gardener Sean Harkin led the group on a walk through the grounds, displaying all of Diana's favorite flowers, including forget-me-nots, white lilies, white roses, tulips, daffodils, and cosmos daisies.

Prince William and Prince Harry also met with representatives of Diana's favorite charities, including the Great Ormond Street Hospital, the National AIDS Trust, the Leprosy Mission, and the English National Ballet.

After the garden tour, the princes read maps and messages that admirers had left at the gates of the palace, and the Kensington Palace Twitter account tweeted gratefully, saying, "The Duke and Prince Harry are grateful for the many flowers, letters, and messages that they received from their mother, they wanted to thank those who made the trip to Kensington Palace. "

The transformation of the sunken garden takes place after Kensington Palace itself was renovated, including a cellar extension) over a two-year period before Prince William and Kate Middleton move in with their children in 2013. Prince Harry also lives in the palace and his girlfriend, actress Meghan Markle, is also said to be involved.

The White Garden was first opened to visitors on the Easter weekend and will close next month after the 20th anniversary of the death of Princess Diana, which falls on 31 August.