Prince William and Prince Harry Tour Kensington Palace’s White Garden in Honor of Princess Diana

The gardens at Kensington Palace have been transformed into 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 their mother’s tragic death.

The two royal brothers, along with Kate Middleton, went on a tour of the White Garden (so named because all 1,200 bulbs planted bear white and cream flowers) on Wednesday. According to Town and Country, Head Gardener Sean Harkin led the group on a walk around the grounds and pointed out all of Diana’s favorite flowers, including forget-me-nots, white lilies, white roses, tulips, narcissi, and Cosmo daisies. Prince William and Prince Harry also met with representatives from some of Diana’s favorite charities, including Great Ormond Street Hospital, the National AIDS Trust, the Leprosy Mission, and the English National Ballet.

After the garden tour, the princes read cards and messages admirers had left outside the gates of the palace, and the Kensington Palace Twitter account tweeted a message of thanks, saying, “The Duke and Prince Harry are grateful for the many flowers, letters and messages they have received about their Mother. They wanted to say thank you to those who made the journey to Kensington Palace.”

The transformation of the Sunken Garden comes after Kensington Palace itself was renovated, including a basement extension), over a two-year period prior Prince William and Kate Middleton moving in with their children, in 2013. Prince Harry also lives at the palace, and his girlfriend, actress Meghan Markle, is rumored to be moving in as well.

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

Watch: Princess Diana’s 8 Most Iconic Looks