From lush and leafy banana plants to the delicate charms of the tiniest trees of all, this week's show is all about planting with a difference. We explore the weird, wild and wonderful Exotic Garden at Wisley, which is packed full of tropical-looking plants and ideas to steal for your own backyard paradise. Tayshan Hayden-Smith, footballer and founder of the non-profit Grow2Know tells the story of how he came to discover and love what's probably the most dramatic plant you can grow outdoors in Britain. And if you've ever wished you could grow a tree but don't have the space, think again, as we take a look at bonsai with RHS expert Peter Goodchild.