The very best of contemporary garden design around the world, beginning with designer Dan Pearson talking about his work at Lowther Castle in Cumbria.

Arabella Lennox-Boyd is the doyenne of horticulrural designers and has been laying out a garden for 40 years at Gresgarth Hall in Lancashire.

A look at Tom Stuart-Smith's work at Hepworth Wakefield Gallery Garden, at task that could pose his greatest challenge.