Cite This Item
MLA
Arnold Arboretum. Hardiness zones of the United States and Canada. August 1, 1948. Web. 29 Mar 2024. <https://ark.digitalcommonwealth.org/ark:/50959/3j3337393>.
APA
Arnold Arboretum. (August 1, 1948). Hardiness zones of the United States and Canada [Map]. Retrieved from https://ark.digitalcommonwealth.org/ark:/50959/3j3337393
Chicago
Arnold Arboretum. "Hardiness zones of the United States and Canada." Map. August 1, 1948. Digital Commonwealth, https://ark.digitalcommonwealth.org/ark:/50959/3j3337393 (accessed March 29, 2024).