Summer gardening and the secrets of seeds

Did you know that the lotus leaf inspired the creation of self-cleaning glass and paints? Or that some tropical carnivorous plants get so big they can eat shrews? Plant hunter and scientist Dr Chris Thorogood shares some of the incredible floral feats that made him fall in love with plants. Garden writer Pattie Barron recounts a meeting with plant that makes a fragrant waterfall of edible foliage with an unmistakeable Mediterranean ambience. Terry Richardson (aka 'The Black Thumb') is a plant paramedic who rescues orchids from bins; hear his tips on turning trash plants into prize specimens. Plus the RHS gardening advice team tackle questions on evergreen shrubs for pots, poorly-looking roses, growing indoor ferns, and how to make your pond water clear.