Carrot

Unlocks once you've harvested 10 Cabbage and 18 Radish in all; unlocking it is then free.

A seed costs 3 spare parts and grows for 3m 20s (2m 40s on fertilized soil), needing water 6 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 Carrot and 4 spare parts: 16 from one seed, 13 more than it cost, over 13m 19s of growing. In a Biofuel Converter each one is worth 3 biofuel.

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