#3 is the most promising so far, we'd like to see those ideas elaborated on, and also try some different color combinations, and try to make the marihuana element more subtle. #1 and #2 are a little too plain. But a good start, thanks for the submissions!
#8 is moving in the right direction. The cannabis element needs to be more subtle. Also, please invert the colors (green on the bottom for the "ground", orange on top for the "sky") and try to incorporate some mountains into it. Great work so far, though!