LONDON - MAY 5: Queen Elizabeth II plants a tree during a visit to The Royal Botanic Gardens in Kew on May 5, 2009 in London, England. The Royal Botanic Gardens at Kew was celebrating it's 250th Anniversary. Getty Images logo Getty Images 9 months ago

LONDON - MAY 5: Queen Elizabeth II plants a tree during a visit to The Royal Botanic Gardens in Kew on May 5, 2009 in London, England. The Royal Botanic Gardens at Kew was celebrating it's 250th Anniversary.