This is my first 'critique' so please be gentle with my comments!(I did read the guide first!)
The three pinnule of the fern, that reach out towards the lens, are slightly out of focus as it reaches towards the lens and bends back towards the stem. If you were to manually focus on the closest part of the fern and used the aperture setting to bring the stem into focus, you would catch the whole of the pinule in focus and then the DOF would soften the background. This would bring out the whole side of the fern sharper without needing to digitally manipulate/ sharpen the image as much.
To manipulate the image, I would also crop the image at an angle and use a frame. Those reds on the stem would also look really good and contrast the green of the background if they were modded slightly with the colour curves to stand out more.
I hope my first critique also helps!