Overview: There’s been a huge surge of interest in houseplants over the last couple of years, so Frances Tophill and Nick Bailey celebrate the joys of indoor gardening in a special programme from Oxford Botanic Garden. Rachel de Thame visits a nursery in Devon which specialises in growing the ever-popular orchid. We meet an interior designer in London, whose use of houseplants at home has allowed him to reconnect with nature. A self-confessed plantaholic gives us a tour of the indoor jungle he’s created at home in Worcestershire, and we meet a gardener in Manchester who gardens on his balcony 18 floors up. We also look at the latest trends and must-have houseplants of the moment, giving the best practical advice on how to care for houseplants and showing how to grow your own for free.