Plot: The best sign of spring is when the Beechgrove Garden returns and Jim McColl, Carole Baxter, George Anderson, Chris Beardshaw and Brian Cunningham are all back in the garden dispensing sage advice to keep growing. At this time of the year, we are normally bemoaning winter storms - so what do we have to talk about after one of the mildest winters on record? Jim and team look at the signs of spring and see if it really has come early this year