Camellias for northen climates?
Anne Raver wrote an excellent article in the New York Times on January 16, 2013 titled "Ready for Their Cold Snap" about hardier varieties of camellias. In fact, she interviewed local plantsman Charles Cresson, who has been growing hardy camellias for years. The article contains plenty of information on specific cultivars to grow and where to purchase them.
In addition, you may want to look at this book in our library:
Beyond the camellia belt :breeding, propagating, and growing cold-hardy camellias by William L. Ackerman. As a PHS member, you may borrow this book. We loan books to our members through the mail. To learn how to do that, call 215-988-8772 or send a borrowing request, along with your name, mailing address and membership number to firstname.lastname@example.org