• Prince Harry and Meghan Markle volunteered to help kids replant flowers at Preschool Learning Center in Los Angeles
  • Prince Harry regrets his last phone call with Princess Diana
  • Prince William and Prince Harry released a joint statement days before Princess Diana's 23rd death anniversary

Prince Harry and Meghan Markle continued their charity work this week, but they also did not forget to commemorate the 23rd anniversary of Princess Diana's death.

The Duke and Duchess of Sussex have been busy volunteering at various charities and they did the same on Monday. The royal couple volunteered at the Preschool Learning Center in Los Angeles and helped kids replant flowers and healthy produce.

The day also marked Princess Diana's death anniversary, so the couple celebrated it by planting forget-me-nots, the late Princess of Wales' favorite flower, Harper's Bazaar reported.

Royal correspondent and "Finding Freedom" co-author Omid Scobie shared some snaps of the couple taken from the event. One source told him that everyone, including Prince Harry and Markle, got their hands dirty.

"Everyone got their hands dirty digging holes for the new pants and seeds and making sure they were secure with enough soil," the source said.

"The kids especially were excited to water the new garden with elephant shaped watering cans."

Prince Harry and Prince William's mom died in a car accident in Paris on Aug. 31, 1997. On that day and moments before the crash, the royal siblings received a call from their mom, but they were too busy playing with their cousins to carry on a long conversation.

"I can’t really remember what I said, but all I do remember is, you know, regretting for the rest of my life how that phone call was," Prince Harry said about his last phone call with Princess Diana.

"How differently that conversation could have panned out if I’d had even the slightest inkling her life was going to be taken that night.”

There are rumors that Prince William and Prince Harry are feuding. However, days before Princess Diana’s death anniversary, they released a rare joint statement about the statue of their mom that they commissioned in 2017. It was supposed to mark Princess Diana's 20th death anniversary, but it got delayed. So, they are moving the installation next year for Princess Diana’s 60th birthday.

"The statue will be installed in the Sunken Garden of Kensington Palace on 1st July 2021, marking The Princess’s 60th birthday. The Princes hope that the statue will help all those who visit Kensington Palace to reflect on their mother’s life and her legacy," the statement released by Kensington Palace read.

Prince Harry and Meghan Markle
Prince Harry, Duke of Sussex and Meghan, Duchess of Sussex visit a local farming family, the Woodleys, on October 17, 2018 in Dubbo, Australia. Chris Jackson - Pool/Getty Images