Nicely handled lighting and colour. The green is pleasing, not overpowering. You need to work on your composition. Try the flower on an angle (diagonals make great line compositions). In this case, you needed a bit more space on the left, as the flower is almost touching the edge. Also, the border doesn't need to be that thick. It doesn't help the image. Nice thin one would have been quite enough. 7
Technically it should be purple/yellow or red/green for complementary colours... green/purple are technically "secondary" colours - but enough science! I actually love the shot. It has a great balance and "feel" to it. Very simple, and the border works well too. I'm not going to go so far as to say this will be a top 10 finisher as there are some great takes on the challenge as competition. I will however say that this is one of my favourites, and I hope you finish well.