The New Adventures of Gilligan Season 2 Episode 8
The Professor’s instruments predict prolonged drought, and with food supplies dwindling, the castaways decide to build an irrigation system and start a farm. Mr. Howell cheats, though, using the Professor’s photo-enlarging fluid as fertilizer. The others discover this, and begin doing it, too, resulting in giant, but inedible, crops.
Episode Title: Moderation
Air Date: 1975-10-18