Britain's Catherine, Duchess of Cambridge plays with Prince Louis at the Adam White and Andree Davies co-designed garden ahead of the RHS Chelsea Flower Show in London, Britain May 19, 2019. Picture taken May 19, 2019. Matt Porteous/PA Wire/Handout via REUTERS

Britain's Catherine, Duchess of Cambridge, speaks with children during a visit to her garden at the RHS Chelsea Flower Show at the Royal Hospital Chelsea, London Britian May 20, 2019. Yui Mok/Pool via REUTERS

Britain's Princess Charlotte plays on a rope swing at the Adam White and Andree Davies co-designed garden ahead of the RHS Chelsea Flower Show in London, Britain. May 19, 2019. Picture taken May 19, 2019. Matt Porteous/PA Wire/Handout via REUTERS

Britain's Prince William and Catherine, Duchess of Cambridge with Prince George and Prince Louis explore the Adam White and Andree Davies co-designed garden ahead of the RHS Chelsea Flower Show in London, Britain. May 19, 2019. Picture taken May 19, 2019. Matt Porteous/PA Wire/Handout via REUTERS

Britain's Catherine, Duchess of Cambridge, looks at a display during her visit to the RHS Chelsea Flower Show at the Royal Hospital Chelsea, London Britian May 20, 2019. Yui Mok/Pool via REUTERS

Britain's Catherine, Duchess of Cambridge, is pictured with Adam White during a visit to her garden at the RHS Chelsea Flower Show at the Royal Hospital Chelsea, London Britian May 20, 2019. Yui Mok/Pool via REUTERS

Britain's Prince William and Catherine, Duchess of Cambridge with Prince George, Princess Charlotte and Prince Louis explore the Adam White and Andree Davies co-designed garden ahead of the RHS Chelsea Flower Show in London, Britain. May 19, 2019. Picture taken May 19, 2019. Matt Porteous/PA Wire/Handout via REUTERS

Britain's Catherine, Duchess of Cambridge, is pictured during a visit to her garden at the RHS Chelsea Flower Show at the Royal Hospital Chelsea, London Britian May 20, 2019. Yui Mok/Pool via REUTERS

Britain's Catherine, Duchess of Cambridge, visits her garden at the RHS Chelsea Flower Show at the Royal Hospital Chelsea, London Britian May 20, 2019. Yui Mok/Pool via REUTERS

Britain's Catherine, Duchess of Cambridge, speaks with a visitor during her visit to her garden at the RHS Chelsea Flower Show at the Royal Hospital Chelsea, London Britian May 20, 2019. Yui Mok/Pool via REUTERS

Britain's Catherine, Duchess of Cambridge, is pictured during a visit to her garden at the RHS Chelsea Flower Show at the Royal Hospital Chelsea, London Britian May 20, 2019. Yui Mok/Pool via REUTERS

Britain's Catherine, Duchess of Cambridge, is pictured with Andree Davies and Adam White during a visit to her garden at the RHS Chelsea Flower Show at the Royal Hospital Chelsea, London Britian May 20, 2019. Yui Mok/Pool via REUTERS

Britain's Catherine, Duchess of Cambridge, is pictured during a visit to her garden at the RHS Chelsea Flower Show at the Royal Hospital Chelsea, London Britian May 20, 2019. Yui Mok/Pool via REUTERS

Britain's Catherine, Duchess of Cambridge, is pictured with Adam White during a visit to her garden at the RHS Chelsea Flower Show at the Royal Hospital Chelsea, London Britian May 20, 2019. Yui Mok/Pool via REUTERS