Overview:Beechgrove Garden looks ahead to spring, with Carole planting a bedding scheme based on the spokes of a colour wheel. Jim and George start the process of battening down the hatches for winter and prepare plants against the weather to come, while Carole visits Attadale Gardens in Lochcarron, Rosshire. Although the garden dates back to Victorian times, Attadale owners Nicky and Ewen Macpherson have recently added contemporary features of particular interest to fern fanatic Carole - a sunken fern garden in a geodesic dome