I thus far had not edited these pictures at all-they were as taken, no cropping or adjustment.
Thank you all for the helpful criticism. I didn't have the option to move the plants when I photographed them, but I tried to use the light from the window and tweak the settings on the camera to make something interesting happen with the focus. I listed the pictures in the order that I like them, with the first one having come out just as I hoped (though I think I prefer the way zandman has darkened it).
I'm hoping to learn to manipulate the light and the camera in such a manner as to avoid having to use the computer for editing.
I really appreciate the feedback you've given me, and I will continue to post photos here.
on my few experience,
digital camera - better to be underexpose
film camera - better to be overexpose
Wrong. Under exposure in digital causes noise. In fact, if you're shooting raw and your meter is correct, you should be able to shoot 1/3 - 2/3 over exposed and bring the exposure down in the post processing which will recover some high lights that might have appear to have been blown (which really aren't, because once the data's gone, it's gone) and create an image with a greater impact than even with a properly exposed image.