Kale

Unlocks once you've harvested 300 Blue Grapes, 260 Green Grapes and 240 Zucchini in all; unlocking it is then free.

A seed costs 75 spare parts and grows for 13m (10m 24s on fertilized soil), needing water 10 times on the way: it stops growing until it's watered. It gives 18 harvests, growing back from scratch after each one.

Each harvest is one Kale and 24 spare parts: 432 from one seed, 357 more than it cost, over 3h 54m of growing. In a Biofuel Converter each one is worth 18 biofuel.

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