Oats

Unlocks once you've harvested 450 Pumpkin, 390 Red Cabbage, 210 Parsnip and 110 Red Onion in all; unlocking it is then free.

A seed costs 24 spare parts and grows for 9m 20s (7m 28s on fertilized soil), needing water 5 times on the way: it stops growing until it's watered. It gives 12 harvests, growing back from scratch after each one.

Each harvest is one Oats and 14 spare parts: 168 from one seed, 144 more than it cost, over 1h 51m of growing. In a Biofuel Converter each one is worth 11 biofuel.

A Reaper chip can improve its grow time, watering, harvests, biofuel or earnings.