| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| In the 1930s, Pan Am grew vegetables on Wake Island for passengers by using this soilless method | hydroponics DD | $3,000 | DJ | AGRICULTURE | 2016-02-24 | #7243 | |
| This science of growing plants without soil was developed in the mid-19th century | hydroponics | $1,000 | DJ | AGRICULTURE | 1994-11-03 | #2339 |