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updatedAt: 2026-07-23T13:34:11.000Z
agentTools:
  projectIndex: https://en.wiki.myfood.eu/llms.txt
---

# Growing conditions

🌐 [🇫🇷 FR](https://wiki.myfood.eu/docs/conditions-de-culture) · **🇬🇧 EN** · [🇩🇪 DE](https://de.wiki.myfood.eu/docs/anbaubedingungen)

## Three important growing parameters:

![1487](https://files.readme.io/59a455dc9b11807e5dc226f19724097b6b1b940475a634c504579595dc0a278e-schema_paramtres_culture_en.png "Paramètres schéma.jpg")

## Temperature

![234](https://files.readme.io/807dcf7-temprature_croissance.png "température croissance.png")

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  ### Control the temperature

  Maintain a temperature below 40 °C<br />In very hot weather, ventilate the greenhouse and/or stop the heating.<br />If that is not enough, place a shade cloth between the tanks and the greenhouse glass and slightly open the fish tank lid until the temperature drops.
</Callout>

## Light

* A photoperiod of 10 to 12 hours per day is essential for photosynthesis.
* To optimize photosynthesis, a shade cloth is required: continuous direct light rays on the aquarium inhibit the process and therefore growth.
* If the spirulina aquarium is indoors, place it in a bright room, with indirect or non-permanent exposure to light.

<Callout icon="📘" theme="info">
  ### Let's save energy

  On days with good brightness, it is not necessary to run the lighting.
</Callout>

## Aeration

It is necessary to allow air to diffuse throughout the culture medium, to promote CO₂ dissolution and therefore photosynthesis, as well as culture mixing.

<Callout icon="📘" theme="info">
  ### Good to know

  - The pH must be between 9 and 11.
  - Spirulina biomass increases by 20 to 25% per day.
  - Prefer harvesting in the morning: the protein content is higher.
</Callout>

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