How Green is Green Park?, a joint venture between the Linnean Society of London and the South London Botanical Institute, took place on Saturday 22 April 2023 in Green Park, central London. All the 20 available tickets were taken, and people gathered near the Constance Fountain to explore the plants in a small corner of the park. In recent years the Royal Parks have done a great deal to try and improve the park’s biodiversity, and although we were unable to reach the more diverse areas near Marble Arch we were able to find plenty of plants to discuss. These included the native ramsons, Allium ursinum, sometimes known as wild garlic, the introduced invasive three-cornered garlic, A. triquetrum, which is also sometimes called wild garlic, two species of speedwell, Veronica, both stinging nettle, Urtica dioica and small nettle, Urtica annua, and two species of deadnettle, Lamium.