There is a wealth of London-based horticultural creators sharing their experiences, advice and musings online.Here are the gardening experts and activists you should know about right now.Guerilla gardener Ellen Miles (@OctaviaChill) reclaims neglected green spaces / Instagram/@OctaviaChillOn TikTok and Instagram, guerilla gardening tips from green activist Ellen Miles blew up during the pandemic, as she reclaimed neglected green spaces with plants, flowers and seed bombs. @dreamgreen.earth is her platform, which helps beginners understand the basics of guerilla gardening and gives advice on how to find the best spots. Highlighting the dark side of gardening and holding institutions to account with the intention of bringing positive change, @decolonisethegarden, founded by Sui Searle (@thetemperategardener) has become a tour de force in addressing issues around race, equality and colonialism in horticulture.Errol Reuben Fernandes is head of horticulture at the Horniman Museum in south London / HandoutGarden designer and head of horticulture at the Horniman Museum, Errol Reuben Fernandes is pushing the limits of what can be achieved in a London garden as the climate warms. Follow James Hitchmough as he plants prairies, creates new dry gardens, and plants quasi-natural miyawaki trees. The landscape architect Ula Maria’s Instagram feed features both her own garden designs and images from other gardens. Paul Wood’s account has great tips and ideas for small spaces. Author of London Tree Walks. This photo documentary shows some of London’s most rare street trees as well as some of its most common. There is no better place to learn about London’s 900,000. Street trees. Urban forager Izzy leads us on a tour of London’s edible plants / AndyTrace. Izzy, a professional urban forager, shares her discoveries about London’s edible flora & fungi. You can find dinner right at your doorstep with everything from alien crumpets (blackmorel mushrooms) and three-cornered leeks, a type of wild garlic. She offers foraging walks. Three gardeners at London’s oldest botanical gardens, the Chelsea Physic Garden are bringing it into the 21st Century with TikTok videos. You can see behind the scenes of how their glasshouses were restored. Learn about plant transformations and ASMR watering, as well as gardening tips and hints.