Herbs are not often referred to within the delicate, pruned gardens at the Royal Horticultural Society's Chelsea flower show. But the past few years have seen a subtle shift towards climate-friendly gardening.

These reishi mushrooms have been grown on volcanic-style mounds using a robotic arm. (CGTN Photo by Nosmot Gbadamosi)

A visitor takes a photograph at the Chelsea Flower Show in London. (CGTN Photo by Nosmot Gbadamosi)

Trailfinders "Undiscovered Latin America" Garden. The Chelsea Flower Show in London emphasizes the benefits of trees. (CGTN Photo by Elizabeth Mearns)