Presenter Chris Myers - who's a Royal Horticultural Society gold medallist and garden designer - and his Labrador Lottie, are joined by one of Britain's top botanists, Dr Trevor Dines, and lichenologist Sally Eaton. Each week holds strange and exciting discoveries for Chris and the team as they search our cities and countryside to discover what grows where today and why. Bold experiments and innovative approaches - from controlled explosions in military no-go zones on the Salisbury Plains to oven-roasting microscopic bears that live by roadsides - help explain why some plants have moved in, others have disappeared, and why this matters to the rest of us. OK, it's essentially about plants, but there's explosions.