Cocoa trees are pretty picky about where they grow. They like a lot of humidity, no cold, and rich, acidic soil. I tried one a couple years ago (along with cinnamon and jakfruit), but they all failed in my greenhouse. I just couldn't keep the conditions right.
It’s a pity. I would surely like to grow my own coffee and cocoa beans. By the way, I hear that the cocoa crop has failed this year in one of the major supply areas-don’t recall which.
Predictions are for a huge increase in prices by December.