Two questions on Cocoa, which are not clearly answered here:
1. Can i use Cocoabeans to plant it?
2. If so, how many of them do i need to plant one?
Would be good if someone is answering that.
Oh, and Alblaka said, that actually NO PLANT requires a special biome.
2. One is all you need, but for quik breeding two is better (as in you can plant two and breed them).
And to the "no plant requires a spezial biome" that might be true, but Cocoa still needs a certain requirement not all biomes fullfill without fertilization and/or hydration.
EDIT: Just looked it up, in a PM he wrote to me, after a false bugreport of mine about not being able to plant cocoa, he stated "It has some additional requirements that are met virtually everywhere, but if you´ve got bad luck and placed your crop on a dumb place, you might not be able to plant it." (paraphrased that from german into english).