Alright, Im a beginner so take this lightly, but the first one seems a tad underexposed, the plant isnt really interesting and the moon could be interesting but it isnt focused at all. The plant is also very bland and really doesnt say anything to me. On the upside, the second shot is very nice and the sky is incredible. I dont really have anything to suggest except maybe the foreground could be lighter. Nice shot you got there.
P.S. You can post all your photos in one post by using FLICKR or Photobucket. Just read the stickied thread they have here.