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This is Boyer's breakthrough 1992 book for those of us who grow cycads and palms outside of the tropics. It includes excellent cold rating data for cycads and palms, and a unique climate zone chart that will help you identify which plants you can grow in your part of the world.
This book went out of print, and a second edition was printed in 1999. We're told that edition is just about to go out of print, as well.
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