Clivia, the popular tropical ornamental plant, is cold hardy to U.S. Department of Agriculture growing zones 9 and 10, according to the North Carolina State University Extension Office. In zone 9, it is best to plant Clivia in a protected area.
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Sandy Mitchell is an Ohio-based writer, blogger and editor. Among other projects, she writes for About.com and "The Better Drink." Before devoting herself full time to writing, Mitchell was a travel agent and cruise school instructor for 18 years. She holds a Bachelors of Science in business administration from Bowling Green State University.