I see photos all the time and I have been making a more conscious effort to stop and actually take the photo. These daffodils are by the Campus Ministry Rock House.
This photo is relatively straight as far as processing goes. No processing was done to enhance the depth of field. Three things come into play to limit depth of field: focal length, focus distance, and aperture. I can only really control focus distance on the iPhone. I could zoom but I am not a fan of the digital zoom.