The Importance of Humidity in Mushroom Cultivation
Mushrooms are more than 90% water, making humidity one of the most important factors for successful cultivation. Even small fluctuations in humidity can lead to cracked caps, reduced yield, discoloration, and an increased risk of disease. In this article, we’ll explain why humidity control is essential for commercial mushroom production and how Dry Fog humidification helps create optimal growing conditions.
Signs your humidity level is too low:
- Cracked mushroom caps
- Small mushrooms
- Reduced yield
- Slow growth
Recommended humidity levels for the different stages of the mushroom growing cycle
1: Colonization
During the mushroom colonization (the incubation phase), the ideal ambient relative humidity depends on the system. If it is a bag or bottle cultivation system, a relative humidity level between 60–75% RH in the growing room is usually sufficient to prevent excessive drying of the bags or equipment. If it is an open-bed system a higher room humidity of around 80–90% RH helps prevent the substrate surface from drying out.
2: Pinning
The pinning phase is one of the most humidity-sensitive stages in mushroom cultivation and requires a very high relative humidity level between 85-95%. During the pinning stage, the high humidity helps to encourage the formation of a large number of pins, prevent tiny pins from drying out, promote uniform mushroom development, reduce cracking and deformation and improve overall yield.
3: Fruiting
During the fruiting stage, mushrooms require slightly lower humidity than during pinning. We recommend a relative humidity level between 85-93%. This helps to produce larger, well-shaped mushrooms, prevent excessive moisture loss and weight reduction and improve cap appearance and texture.
4: Harvest
The ideal humidity in a mushroom harvest room is slightly lower than in the fruiting room and can be reduced to around 80-90% RH. This will help to reduce moisture loss and weight loss after harvest, preserve firmness and freshness and to improve shelf life and marketable quality.
5: Storage
Due to the high water content in mushrooms, they also require a high level of humidity during storage to prevent them from losing moisture. We generally recommend a RH level around 85-95%. It is also important to store the mushrooms in a cool room around 0–4°C.
Solution: High precision humidity control
Humidity control
Control your humidity levels accurately with AKIMist®. An energy-efficient and compact solution. It is both available in a wall-hanging and a portable model and easy to install. AKIMist® is known for being non-wetting due to its tiny droplet size around 7.5 µm. This prevents the mushroom caps from becomming wet which makes it easier to control their water intake. Thanks to the small size of the Dry Fog humidifier AKIMist® (~5 inch), it can easily fit in a tight growing room or under a low ceiling. AKIMist® can either be mounted to the wall or ceiling with our easy installation kits. A portable version is also available.
Different humidity levels
Different species of mushrooms have different humidity requirements, but in general, the ideal humidity level for mushroom cultivation is between 85% and 95%. To maintain this level of humidity, growers may use various methods such as misting, watering, or placing a humidifier in the growing area. It is important to monitor humidity levels regularly and make adjustments as needed to ensure optimal growing conditions.
Other factors
There are many other factors that can affect mushroom cultivation, including temperature, lighting, substrate, and ventilation. It is important to have a good understanding of all of these factors in order to successfully grow mushrooms.
Advantages of AKIMist® Dry Fog humidification for mushroom cultivation
Humidity control leads to a higher mushroom yield as the growing progress is accelerated.
Humidity control leads to more uniform mushrooms as the environment is fully controlled.
Since AKIMist® is non-wetting, it reduces the risk of water puddles and the evolvement of unwanted bacteria and fungus.
Due to its tiny droplet size around 7.5 µm, the droplets will bounce back and evaporate without bursting.
AKIMist® uses 80% less energy than conventional humidification equipment which makes it very cost-efficient.
AKIMist® is extremely compact (5 inch) and easily fits into a growing room.
AKIMist® puts you in full control of the humidity level in your growing room and can be automated with a sensor.
When used with purified water, AKIMist® requires very little maintenance
AKIMist® has been developed and produced in-house in Japan which ensures the highest standards in quality and reliability.
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Download our AKIMist® catalog to learn more about the technology behind Dry Fog
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