hmmm before any direct input from me a few questions first:
1) what did you use to take the photos - yes I know a camera, but which sort? A DSLR, a point and shoot, a bridge camera (point and shoot with manual settings). Did you use any flash
2) how did you take the shots - handheld - tripod - what shooting mode?
3) What settings did you (or the camera) use for each shot - aperture, shutter speed and ISO? To find this info check the properties for each photo and go to the details tab - scroll down to find the mentioned settings for each shot.
May I suggest posting one image at a time and asking for input on that one image? Then focus on what feedback you get and put the suggestions to work!
From the group you posted, the fifth is easily the most appealing to me. It has a more interesting composition and shooting angle, the poppies are slightly isolated from the background and the lighting is good. Are there things that can be tweaked? Sure, but that almost always true!