With the unpredictable weather on every gardener's mind, this edition takes a closer look at climate change. Carol returns to the dry garden to look at the plants that can survive the threat of a hot summer, while Joe and Alys look at the tender exotic vegetables that we can now grow outdoors including the melons in the new melon bed. Meanwhile, gardener Toby Buckland goes off in discovery of the plants that have jumped the garden fence and that are now naturalising themselves in the wild. And Matthew Wilson from the Royal Horticultural Society looks at two of the society's gardens and explains how they have risen to the challenge of the changing environment.