It looks like either 36 female clones or so planted in a square at the change of seasons like that Bozo up there said or a plant that was LSTd during the early summer under a net.
If you do the female clones SOG thing, you can give them 4 days of darkness starting the last week in July, and put them out Aug. 1st. They will start to flower immediately, and stay nice and discreet.