Hello all.  I decided to shoot from the hip and purchased a couple of arabica coffee trees.  I bought them online from a nursery in California.  When I ask him questions I get incomplete sentences that have a tone that makes me think I am annoying him.  So here I am asking all you pro's for some guidance.

I have 3 trees that are about 6" tall and are in a 12 inch pot.  I used an organic soil that was labeled for trees and organic fertilizer that is 6% nitrogen.  I live in NJ and right now its a little cool out.  So I placed the trees in a room with a heater to keep the temp about 75 - 80 and it receives about 2 hours of direct morning sun by a window.  After that it receives indirect light.

My question is now this.  Why are my leaves turning brown?

Thanks,

Mike