Alan Titchmarsh and Joe Swift launch a week of Chelsea celebrations with a look at the designers paying tribute to the lyrical landscapes of the world.
As the Royal Hospital opens its gates to this year's celebrity visitors, the show team traces the gardens inspired by a host of different areas of the world, from the countryside of Japan's Nagasaki to the Welsh estuary. There's news and views on the show from this year's famous faces and a report on the Queen's customary visit to the flower show.
click here to see where to watch or .
Ready to Watch RHS Chelsea Flower Show, Season 2011, Episode 4?