Leek

Unlocks once you've harvested 4 Wheat and 4 Radish in all; unlocking it is then free.

A seed costs 2 spare parts and grows for 3m (2m 24s on fertilized soil), needing water 3 times on the way: it stops growing until it's watered. It gives 4 harvests, growing back from scratch after each one.

Each harvest is one Leek and 4 spare parts: 16 from one seed, 14 more than it cost, over 12m of growing. In a Biofuel Converter each one is worth 2 biofuel.

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