Monty Don prunes summer-fruiting raspberries and gives his recommendations for bulbs to plant now that will thrive in pots and bring much-needed colour next year. Frances Tophill meets a Norfolk gardener who, at 97, still gardens every day, while Adam Frost takes a look at a new garden at RHS Wisley that has been planted up with tropical plants. Plus, Carol Klein helps a Buckinghamshire viewer struggling with heavy clay soil, Alan Power outlines seasonal spring highlights at Stourhead and the programme visits a tiny Essex garden packed with plants, ponds and seating areas.