Monty Don makes plans for a colourful spring by planting bulbs and nectar-rich wildflowers for an early and welcome feast for insects. Frances Tophill travels to a Birmingham allotment to meet an enthusiast who has filled his plot with dahlias, which he grows for competitions, and Nick Bailey is at Powis Castle in Wales to find out what it takes to trim their centuries-old, 14-metre-tall yew hedges. Adam Frost visits Sezincote Garden in Gloucestershire to find out about its history, and Toby Buckland takes a look at a garden in Cheshire where different sections have been designed with small gardens in mind.