To wire that thing, just get a cheap extension cord, or some old lamp that doesn't work... cut the plug and strip a little bit of wire, and attach. It shouldn't matter which one goes to which. It could be that wiring it one way makes the fan spin one way and the other, the other... but usually not (in my experience). To be exact... the white should be the positive, the black the negative or neutral. The little prong on the plug/ outlet is the positive (charged) one, and the big prong is the neutral, so you can line it up like that.
Plants are looking great!