Choosing the right aperture was crucial for a shot such as this. I wanted parts of the flower to seem almost like they were floating as compared to the rest of it. A shallow depth of field was necessary. Given the low light in the evening's garden, this worked in my favour as I would have used a larger aperture anyway, allowing the most light possible in through the shutter.
The echo of the same type of flower in the background is effective so long as it is not competing by way of equal clarity.