RHS Chelsea Flower Show 2007

LONDON - MAY 22: 'Cannabis sativa' plants are displayed during the Chelsea Flower show held at the Royal Hospital, Chelsea on May 22, 2007 in London. It is the first time that cannabis plants have been at the show requiring a special licence to grow the plants; the plants have been cultivated to be rid of the psychoactive substance THC and are grown strictly for their fibre. (Photo By Miles Willis/Getty Images)