Xavier I found this article sited in 2 different articles on the web.
Hope it helps
I had sent a tea plant to a friend once but it did not do well
They say Zone 8 (mid-west/south) has the best climate for growing and if growing a plant in other areas they suggest a greenhouse.
@jopj thanks for the link it made for interesting reading. Here’s also an article on how to grow Camellia Sinensis from a cutting. I suppose you’ll want to start from seeds Xavier, but I was also interested in reading whether it was possible from a cutting.