Overview: Rachel de Thame thinks that irises aren't getting the attention they deserve. On her revival she uncovers one woman's mission to save a unique collection of heritage irises and she gets creative with floral art using irises for inspiration. Toby Buckland reveals there is so much more to grass than meets the eye. On his revival he discovers the Victorians' passion for ornamental grasses with a visit to the Royal Botanic Gardens at Kew; he attempts to rebrand grasses to deal with their complicated, tongue-twisting Latin names, which often put gardeners off; and he meets a modern-day plant hunter who travels the world in search of unusual and exotic grasses.