"To photograph is to hold one's breath, when all faculties converge to capture fleeting reality. It's at that precise moment that mastering an image becomes a great physical and intellectual joy."
~ Henri Cartier-Bresson
This is a great capture indeed. However I think that the border (white lines) distracts rather than add to the image. I would suggest going without the border or using a thinner, less noticeable border.
Aside from that I must congratulate you on excellent composition, DOF and lighting.
this is just perfect i love how instead of a really bright lighting on the sunflowers like some do you did it a darker lighting which in my book is the best well done @ATEN@
Your images are so beautifully full of sunshine. This one is no exception.
Very stimulating and cheerful picture which I like A LOT !!!