Gardeners' World - 2008 - Episode 18

At Berryfields, Carol Klein reveals some of her favourite plants, while Joe Swift prepares his allotment for when he goes on holiday. Ethnobotanist James Wong looks at some garden plants that are endangered in the wild, and sweet peas come under the scrutiny of the Royal Horticultural Society at the trial grounds at Wisley. The staff at the RHS gardens at Harlow Carr and Rosemoor also show off their best performing plants of the season and give advice on how to look after tomatoes.