Spring into action: seasonal advice special

This week's programme is jam-packed with great gardening advice from our RHS experts on a huge range of topics to get your garden off to a flying start, including how to smarten up your garden and plants for spring colour. It's dahlia planting time and top dahlia breeder Dr Keith Hammett offers insight into the wonderful world of this most variable of garden flowers ('I like to call them the dogs of the plant world'!). Did you know you can propagate some houseplants by literally pulling the roots apart? And others can be grown from sections of leaf? RHS gardening advisor James Lawrence explains. Plus Chris Young with a preview of the latest issue of The Garden magazine.