<P> The RHS Chelsea Flower Show, formally known as the Great Spring Show, is a garden show held for five days in May by the Royal Horticultural Society (RHS) in the grounds of the Royal Hospital Chelsea in Chelsea, London . Held at Chelsea since 1912, it is the most famous flower and landscape gardens show in the United Kingdom, and perhaps in the world . The show is attended by members of the British Royal Family and attracts visitors from all continents . </P> <P> Highlights to the Chelsea Flower Show include the avant - garde show gardens designed by leading names with Floral Marquee at the centrepiece . The Show also features smaller gardens such as the Artisan and Urban Gardens . </P>

When was the first chelsea flower show held