Cold Hardiness Of Cedrus Deodara - Knowledgebase Question

Edenton, NC
Question by cseadog
August 13, 2002
I live in Zone 8 and will be moving to Keyport,New Jersey.Zone 6,I think.Do you know if Cedrus deodara can survive there.As a notation of obsevation I have seen Cedrus(Blue Atlas Cedars) growing in Jersey around Basking Ridge.Hope you can help me as I am leaving in a week. These plants are 3' tall/3gal pot size and orginally were 1 gal/grown from your Nursery.


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Answer from NGA
August 13, 2002

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According to Michael Dirr's "Manual of Woody Landscape Plants", Cedrus deodara is hardy to 0 to 10 degrees. He mentions that there are reports of the tree withstanding minus 12 degreees but he does not believe them to be true. The Monrovia plant catalog indicates a hardiness range of 0 to 10 also, and this would be USDA cold hardiness zone 7. Atlas Cedars (Cedrus atlantica), it is interesting to note, are considered one zone hardier, to zone 6. To some extent your success would depend on the microclimate in the exact location where you keep them because a sheltered location, wind exposure, refleced heat from buildings and so on can all contribute to the microclimate and sometimes mitigate the cold enough to make a fairly substantial difference. I'm really sorry I can't be any more encouraging than that.

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