Overview: Gardening magazine. Jim has set up a replica of his own greenhouse at home and this week he is adding some half-hardy plants with colour. Meanwhile, Carole is starting off her hanging baskets early and is trying 3-in-1 plug plants. Chris continues development of the new rose garden, which has been planted with every variety of rose - but how will they cope with exposed Scottish conditions? George visits Dr Tony Toft in his garden at Hermitage Gardens in Edinburgh, which is a showpiece display of unusual species mixed tastefully with specially commissioned pieces of art and sculpture.