As summer hits its stride we head into the orchards at RHS Garden Wisley to meet Sheila Das and Liz Mooney. They explain how the garden is greening up its act, bringing wildlife and wildflowers into the heart of the productive growing spaces. Then we head to Alresford in Hampshire, to meet watercress grower Tom Amery who shares the secrets of growing this uniquely healthy British favourite. Plus author Sandra Lawrence tells the tale of an unsung hero of horticulture, the mysterious Miss Willmott – a gun-carrying Edwardian plant collector with a complex personal life.

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