Local and London:

Incredible Edible Lambeth     supporting local food growing

London Parks & Gardens Trust

South London Botanical Institute

Carshalton Lavender

Open Squares

National:

The Royal Horticultural Society

The National Vegetable Society

The National Chrysanthemum Society

The National Open Garden Scheme

National Dahlia Society

The National Fruit Collection

British Iris Society

The Gardens Trust

Hardy Plant Society

Alpine Garden Society

The National Sweet Pea Society

Tender Shoots Garden Club Network