Does Mycelium Need Light to Grow?: 1 Minute to Understanding Mycelium Growth Requirements

Mycelium, the vegetative network of fungi, is responsible for nutrient absorption and plays a critical role in the development of mushrooms. For those curious whether mycelium requires light to grow, the straightforward answer is: mycelium does not need light for its primary growth stage. Unlike plants, mycelium lacks chlorophyll and does not conduct photosynthesis. Instead, it thrives in dark, humid, and nutrient-rich environments where it can colonize substrates such as wood, soil, or grain. Light exposure, while unnecessary for mycelium colonization, may play a role in signaling the next stage—fruiting—which produces mushrooms. However, during the colonization phase, darkness or low light is often preferred, as excessive light may even slow mycelial growth.

As an interior designer, I often encounter projects that incorporate organic elements or biophilic designs. If you are considering a space for growing fungi or adding living features such as a mini-mushroom wall, understanding mycelium’s lighting needs is essential. Integrating naturally dark or shaded areas allows for discreet inclusion of these living organisms. If you’re visualizing how living elements will look or fit into a space, tools like AI Interior Design can help you plan and visualize environmental factors, including optimal placement for growth and aesthetics.

Tips 1:

When planning your grow area inside the home, ensure adequate ventilation and maintain humidity. Consider materials and color palettes that complement the organic aspect of mycelium while ensuring easy cleaning and durability for the space. Incorporating these elements results in a harmonious blend of function, style, and biology.

FAQ

Q: Will mycelium grow faster in the dark or in the light?

A: Mycelium typically grows faster in the dark, as light is unnecessary and may slightly impede colonization rates.

Q: Does mycelium ever need light during its life cycle?

A: Light becomes relevant when it's time for the fungus to produce mushrooms. This fruiting stage benefits from indirect light to trigger development.

Q: Can I grow mycelium in a closed cabinet or drawer?

A: Yes, as long as you control for temperature, humidity, and airflow, a cabinet or drawer works well for mycelium colonization.

Q: What is the best environment for rapid mycelium growth?

A: A dark, warm (about 22-24°C or 71-75°F), and humid area with good air exchange is ideal for mycelium.

Q: Will sunlight harm mycelium?

A: Direct sunlight can dry out the substrate and stress the mycelium. It’s best to avoid prolonged or intense light exposure during the growth phase.