Self-sufficiency and sustainability are key to The Castle Garden. The centre's organic waste is composted and the garden team lead workshops and teach skills in organic and sustainable food-growing methods to those who volunteer. The garden has been created in the grounds of an old Victorian water pumping station, (now an indoor climbing centre). The kitchen garden also features a forest garden, beehives, round house and willow dome, and supplies the kitchen and café with organic produce. Herbs for the garden's own tea blends and other herbal products are grown and processed on-site, and sold in the shop and café.