Thanks Paco.
I had been thinking about the orientation but that has two main drawbacks (for my feeling).
First the light and colours, coming from above with the sun close to it's highest point. This influences the green especially. Changing the orientation would not feel good. (perhaps it could work in B&W were a light source is not influenced by colour)
Secondly, when in a portrait mode, the framing and the image is not working in the same way with that view. The space to the right, is not really filled in to make it balanced. That would need a different approach.
I did however take another flower in the 'portrait'-mode, but with a slightly different interpretation