50 Shades of Green: Britain's favorite gardener, Alan Titchmarsh, celebrates horticulture around the UK as he counts down his 50 favorite things. With appearances from friends and experts who share his passion--including Mary Berry and Griff Rhys Jones--Alan visits the gorgeous greenery at Kew Gardens, Blenheim Palace, Chatsworth House, and even the place where it all began for him: his grandfather's vegetable garden.