how is this look achived ?

[HDNitehawk]

When you click the links the OP gave it takes you to the picture owners photostream. As the owner posts different photo's you can't be sure which he is talking about. When I first clicked the links the first picture in the series was of a girl holding a rope with a fogged look in the background.

While I am not expert on lighting, far from it, I have taken many pictures inside of an arboretum / greenhouse. The look of the photo I saw looks just like the effect you would get inside of an arboretum, diffused light and softness. I would have guessed that it was shot inside if I were guessing. If you look at the landscaping in the picture, it looks more like what you would see in an inside garden. If this really is an effect he created in photoshop, I would be curious how.

Am I looking at the wrong picture, and am I even talking about what the OP was wanting explained?