The Green Thumb (GT) sov trait does not work properly 100% of the time when starting a game.
Sometimes, when I start a game, the GT food shows up in my resources. I can immediately start building housing on turn 1.
Other times, I did not have my food on turn 1 and was forced to start building the beacon.
Workaround: If I saved a game w/o food and reloaded it, my food showed up.
Start Game - Save - Load - Start building.