The Diggers is a non-profit organisation based in Victoria which provides heirloom varieties of fruit and vegetables seeds as well as ornamental flowers. In Adelaide, the Diggers have a shop at the Adelaide Botanic Gardens. They hold workshops and masterclasses on a regular basis. The Diggers offer membership, which provides discounted prices on purchases, a regular newsletter, as well as technical support via e-mail and telephone.
Diggers club Adelaide: https://www.diggers.com.au/our-gardens/adelaide/garden-shop/