Overview: Seed scattered and sown, and lawns grown and mown. Carole shows us an easy way to sow flower seeds while Jim toils away on the lawn. Then it's sweet pea planting - scrambling v cordon-trained. Chris is back with Jenny and Euan MacLean in Linlithgow for a second visit to their nightmare plot and this time it's dreamy breakfast-and-teatime terraces and the perfect pergola. George is still in a tight corner tending his small-space vegetable garden. Carole visits Hamish McKelvie and his prickly friends in Houston, Renfrewshire. Since boyhood, Hamish has built up a huge collection of cacti.