Is it only me? I find the 1st pic has great focus and it is a lovely picture. The next two, well, the 2nd seems to be better focussed on the fine hairs on the green leaves and the 3rd, maybe it was a problem deciding exactly on which flower to focus?
I presume the purpose of a challenge is also to help photographers grow, so I think you should encourage healthy critique, not just various versions of 'how beautiful' comments.
Thank you :-)