Horticulturalist Carol Klein proves how easy it is to grow your own food, getting down to earth with root vegetables. Carol takes first-time veg grower Louise to a seed swap and lends her family a helping hand in their brand new veg garden. Excitement takes hold as new seedlings appear and the plot really begins to take off. Meanwhile at the Royal Horticulural Society's Harlow Carr garden, Yorkshire, the gardeners get to grips with their three-metre square plot.