Carol Klein continues to take a closer look at the nation's favourite plants and meets the people who dedicate their lives to them. This time she's admiring the daffodil. Plus a visit to dahlia enthusiast Darren Everest on his allotment in Kent. He knows a thing or two about dahlias - he's been growing them, in all shapes and sizes, since he was just 11, and showing them, with great success, since he was a teenager. In his own garden, Longmeadow, Monty Don pots up his own dahlia tubers, and offers tips for getting the best results later in the year. And Joe Swift meets a Lancashire gardener who has spent 20 years creating a spectacular garden on a rocky cliff-face behind her home.