How do you grow fruit and veg that doesn't cost the earth? Edible gardening guru Mark Diacono shares tips from his decades of experience growing all kinds of palatable plants as sustainably as possible. RHS Gardening Advisor Leigh Hunt gives tips on how to use less water but still get brilliant results on your plot, and historian Fiona Davison shares her delight at putting together a new digital collection chronicling how gardeners come together to get through tough times. Plus researcher Advolly Richmond tells the forgotten story of 20th century gardening heroine, Norah Lindsay.