Learn more during the annual BGANZ Botanic Garden Open Day, which will be held across Australia and New Zealand on Sunday 28 May, 2017. The Botanic Gardens Australia and New Zealand Inc (BGANZ) is the chief body representing the interests of botanic gardens in Australia and New Zealand. BGANZ promotes the interests and activities of Australian and New Zealand botanic gardens and botanic gardens generally and promotes botanic gardens for the benefit of the community.