They might not be good enough yet, but they're a heck of a lot better than your start.
You still need to work on colors, but do that at the end.  Work in a black & white mode so you can really see how things hold up to their surroundings.
What everyone means by busy is..... it looks like a circus going on in back of the copy and everything is clashing and screaming to be, read me.....  read me.....  read me.....
I like the bottom banner, the size of the vegetables in #2 and the sun in #1.
Keep the copy your main focus…. get a small gradient sun back there and put your veggies in there at a reduced size and I think it has some possibilities.
:U Rock:  I’m really impressed you came back and kept trying.  You didn’t take any remarks the wrong way.  You got what it takes; now we just have to pull it out of you.
No one will learn a thing if all they get are samples.  You’ll end up basically copying, so it’s good to see you’re creative juices flowing and doing this on your own.  
