ok, first, i'd repot. it looks like you still have it in the nursery pot it came in. second, joclyn is right. they like a lot more moisture than that. also, i'd raise the pot up over the tray and keep water in the try to raise the humidity around them. it won't be a lot of humidity, but it will help. you can also group some other plants
around it to help with the humidity also.
finally, even though this is a "tree
" in its native environment, i'm moving this to houseplants because that's what it is for our purposes.