From Unofficial Stationeers Wiki

Stacks Yes (20)
Prefab Hash 2044798572
Prefab Name ItemMushroom
Logic Classes
Food Nutrition 10
Food Quality Low (-25% hydration capacity)
Growth Time 1h 0min 1s
Mood Bonus -25%

Mushrooms can be grown in hydroponics without light to yield 3 Mushrooms and 1 Mushroom Seed when fully grown. They must be replanted after being harvested, using either a Mushroom Seed or a raw Mushroom. Unlike other plants, mushrooms will be damaged when exposed to sunlight or Grow Lights. Mushrooms are not damaged by exposure to suit lights, Portable Lights, or normal |Wall Lights, only sunlight and Grow Lights.

As they are fungi, mushrooms consume O2 and produce CO2, the opposite of how other food crops work (a change, according to the implementation notes, intended to align with how fungi function in the real world[1]). When farmed with an equal number of other food crop in an atmosphere containing both O2 and CO2, a net balance of gases can be achieved (O2 and CO2 will both be produced and consumed at the same rate). Note that mushrooms cannot be exposed to sunlight/Grow Lights, while other plants require sunlight/Grow Lights, so care must be taken if farming mushrooms with other plants in the same area.

Plants need the following:

  • Atmosphere: Minimum atmosphere pressure 7.7 kPa, with traces of CO2 (at least 0.1 mol) and under 1% Pollutant (X).
  • Temp: Minimum atmosphere temperature of 0C (293K) is required for growth, under 0C (273K) or over 50C (323K) the plants will die after 5 minutes.
    • The ideal temperature range for maximum growth speed is between 20-30C
  • Water: 5-60 Degree Celsius to avoid taking damage
    • Plants require Water, but consume only ~0.043 mols per hour (0.0216)
  • Light: either sunlight, or a Grow Light are required for plant growth. A plant won't die or take damage when in darkness, but the growth will slow down cumulatively if improper lighting conditions persist.
    • If too much or too little light is provided to the plant, it will begin to accumulate "Illumination Stress" that lowers the efficiency of its growth. It will slowly revert to normal when the plant only if it is in favorable lighting conditions. The amount of accumulated stress can be seen with Cartridge Plant Analyser
    • On some planets and in some conditions, the natural sunlight will not be enough for the plant to grow efficiently without accumulating "Illumination Stress". A Grow Light is then required. It can be used along with natural light, to supplement the overall lighting to the necessary levels.
  • Optionally: you can increase yield or growth speed by adding fertilizer created in a Portable Composter or an Advanced Composter
Info Data
Time to fruiting 1 hour
Yield 3
Raw Nutrition 10%
Edible By Chickens No
  • Produces CO₂ and consumes O₂ at 0.072 mol/minute (0.0012 per tick)


  1. Official Steam patchnotes Steam Newshub