RHS London Urban Garden Show
Time Out says
Green-fingered Londoners, rejoice: there's now a gardening show just for you. Discover the best succulents, herb gardens, ivies, palms and ferns as well as tips from experts on how to look after your living wall. Plenty of kokedama and terrarium workshops to dig into too, and bars and street food will provide delicious snacks and lunch while you wander.