| Do not know with accuracy the scale USDA. But I believe that z6 must be a very cold temperature for the Camellias. You should read the work of the Dr. Ackerman. he was employed at National Arboretum in Washington D.C., he is recognized throughout the world by your works on Camellias. Specially on Camellias for places of very cold temperatures. You can read your work in the Optional LINK. Pardon for my evil English. Regards. |
Here is a link that might be useful: Winter'sCamellias Dr.Ackerman