Monty Don unveils his plans for a wet meadow. He starts by planting herbaceous perennials that will thrive in heavy soils and also look good amidst the long grass. He also pots-on his salvia cuttings and explains the benefits of planting 'green manure' in the veg patch. Now that he has harvested his potatoes, that is exactly what he is doing to boost the fertility of the soil for next year. Carol Klein goes to the Welsh mountains to pick up some veg-growing tips from some green fingered ex-miners at their pristine allotments. And Tom Hart-Dyke goes to one of his favourite gardens, Abbotsbury Subtropical Gardens in Dorset, and he is on the look out for unusual plants from far-flung shores that we can be grown in gardens in Britain.