How Long Does It Take For Amanita Muscaria To Grow

As an expert on mushroom growing, I am often asked about the growing time for the iconic Amanita muscaria, also known as the fly agaric mushroom. This unique and intriguing mushroom has a rich history in folklore, as well as a striking appearance with its red cap and white spots. Let’s delve into the fascinating process of how long it takes for Amanita muscaria to grow, from spore to full mushroom.

Spore to Mycelium

The journey of an Amanita muscaria begins with a tiny spore that needs the right conditions to germinate. After spores have fallen on the ground, they require a moist and nutrient-rich environment to start the process. The spores germinate and form mycelium, which is the vegetative part of the fungus consisting of a network of thread-like hyphae. This initial stage can take anywhere from a few days to a few weeks, depending on factors such as temperature, humidity, and substrate quality.

Mycelium Growth

Once the mycelium has established itself, it continues to grow and spread through the substrate. This growth phase is crucial for the development of the mushroom. Amanita muscaria mycelium typically grows at a moderate pace, and the time it takes to fully colonize the substrate can range from several weeks to a few months.

Formation of Fruiting Bodies

As the mycelium matures, it begins to form the recognizable fruiting bodies, which are the actual mushrooms that we see above the ground. The formation of Amanita muscaria’s fruiting bodies is influenced by environmental factors such as temperature, humidity, and light. In optimal conditions, the mushrooms begin to emerge from the substrate. This stage can take around 1-2 weeks once the mycelium is ready to produce fruiting bodies.

Mushroom Maturation

After the initial appearance of the fruiting bodies, the Amanita muscaria mushrooms continue to grow and mature. The distinctive red caps expand, and the characteristic white spots become more pronounced. The maturation process typically takes another 1-2 weeks before the mushrooms are fully developed and ready for spore dispersal.


In conclusion, the complete growth cycle of Amanita muscaria from spore to fully mature mushroom generally spans several months. However, the specific timing can vary depending on environmental conditions and the quality of the substrate. The process of nurturing these iconic mushrooms from start to finish is a rewarding journey for mushroom enthusiasts and cultivators alike.