If I`m interested in a plant then I will look at every single photo regardless of what order. As long as they are easily accessible and viewable from thumbnails I would be happy. Thumbs up means people like that picture or perhaps the contributor is their friend they want to show appreciation but I`m not understanding why that should affect the order. I think they should show by date added and All of them should and will be great photos.
I think the photos could have categories like blooms,whole plant and foliage as the database grows. Karen