There are several ways to gain extra nutrient production.
- Recycling Tanks or Pressure Dome improves the base square
- Tree Farm and Hybrid Forest improve forested squares
- Aquafarm improves kelp
- Sky Hydroponics Lab distributes nutrients to each base
- non-negative planet rating allows fungus to produce nutrients as well.
Starting each turn, if a base's nutrient storage is full, and the net gain of nutrients is either neutral or positive, the population grows by one and the storage is emptied. If there is a net loss beyond exhausting the storage, the population decreases by one. Then nutrients produced are tallied up, and two per population point are consumed. Nutrient storage is then adjusted by the net gain or loss, gains are limited to the bases storage capacity.