What defines a temperate rainforest

As 2025 comes to a close, host Nick Turrell looks back on a year of discovery in this special end-of-year edition of Gardening with the RHS. From the quiet resilience of winter-flowering hellebores with plantsman John Grimshaw, to the gentle industry of hoverflies with RHS entomologist Josie Stuart, and a summer journey into Britain’s rare temperate rainforests with designer Zoe Claymore, this reflective episode revisits three listener favourites that reveal how even the smallest patches of nature can support a much wider living network.