I found quite by accident, that my camellias root best when cuttings are taken in December/ January. I had some breakage due to last year's brief ice storm and I took the cuttings and put them in a forsythe pot. ( Just a large pot with a water reservoir in the center). I left the pot outdoors all winter and by March/April my little camellias were putting out new growth. I didn't expect anything to really root, but more cuttings survived that way than when I took them in July and August It was a great surprise. Now it is the only way I root them.