This is a highly touristy, well-manicured, and tightly controlled field of neatly planted flowers on a hillside in Carlsbad, south of Los Angeles.
Honestly, it was underwhelming. The flowers were pretty to look at, of course, but there were no real authentic photo opportunities since they control where you are allowed to go -- and it's not far. There are also condos in the back, and a huge parking lot in the front, so the background in any shot, if it's not all flowers, isn't great.
ESPECIALLY because they charge $12 for admission! And they wouldn't give us a discount even though we arrived an hour before they closed.