R.G. wrote:
Flowers are very strong subjects and can stand on their own. Put another way, flowers don't need context - but that doesn't mean that context is a no-no. The amount of context can be chosen on the basis of how desirable it is. In your posted example the background is relatively plain so it wouldn't add much to picture. The flower, on the other hand, is anything but plain so it's worth focusing on and deserves to be placed centre stage.
And that is how I would crop it.