
Mushrooms are a type of fungus that grows in humid environments and requires daily watering. They are tricky to grow and require a specific amount of water to thrive. Over-watering can cause mushrooms to rot, while insufficient watering can lead to shrivelled caps or stunted growth. Therefore, it is essential to understand the specific requirements of the mushroom variety being cultivated to ensure optimal water distribution and prevent common issues like discolouration or poor growth.
| Characteristics | Values |
|---|---|
| How often to water mushrooms | Mushrooms need to be watered every day and often, but not too much. |
| Watering method | Spraying with a spray bottle or watering can, or misting. |
| Water type | Bottled spring water or collected rainwater. If tap water is used, it should be city tap water. |
| Water temperature | Cold. |
| Lighting | Mushrooms need daylight to trigger growth, but not direct sunshine. |
| Temperature | Mushrooms should not be exposed to extreme temperatures. |
| Air humidity | 95% during primordials formation, 90%-92% as mushrooms are growing. |
| Air speed | Slow. |
| Soil type | Casing soil should be wet during mycelium growth. |
| Water quantity | 10-15 liters of water per m² during mycelium growth. |
| Watering during picking | Watering should be stopped during the picking process. |
| Watering after picking | After picking, mushrooms must be dried to avoid bacterial blotch and yellow discoloration. |
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What You'll Learn

Mushrooms are sensitive and require daily watering
Mushrooms are tricky to grow, and it is hard to know the right amount of water to give them. A common reason for mushroom failure is over-watering; too much water can rot the mushrooms, and too little water will cause them to die. The amount of water supplied should be enough to support a healthy nutrient transport system and reproduction cycle.
The best time to water mushrooms is in the morning and evening, and they should be watered at least twice a day. If you have more time, you can water whenever you see that the mushrooms have become dry. Each species of mushroom has its own set of requirements, so it is important to know the specific needs of your crop.
One method of automatic watering involves a simple gravity-fed system using a network of tiny hoses with holes from a higher water source. Another method is to moisten the medium and cover it with a plastic cover to hold the moisture for longer. It is also important to control air humidity during mushroom formation and the picking period. Dry air will give the mushrooms a scaly "skin".
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Watering methods: spraying, misting, sprinkling, soaking
Watering mushrooms is a delicate task. They need to be kept moist to grow, but too much water can lead to slimy caps or even cause the mushrooms to rot. They need to be watered every day, and sometimes even twice a day, to prevent them from drying out.
Spraying
Spraying is a common method of watering mushrooms. It is recommended to use a spray bottle with fresh tap water to create a light mist over the entire surface of the mushrooms and their growing environment. This should be done a few times a day to maintain humidity. The misting bottle should be rinsed out regularly and refilled with fresh water.
Misting
Misting is similar to spraying, but it typically refers to creating an ultra-fine mist using a specialised misting bottle or spray bottle. Misting is done to increase and maintain the humidity in the mushroom's environment, which is crucial for mushroom development. Misting can be done directly onto the mushrooms and their substrate, as well as the walls of the growing chamber.
Sprinkling
Sprinkling is another method of watering mushrooms, especially when they are grown on logs. A standard hose or a sprinkler system with micro-sprinklers can be used to water the logs for a few minutes until they appear wet. However, this method may not penetrate the logs very well, and it can be time-consuming as the sprinkler needs to be moved regularly.
Soaking
Soaking, or "dunking," is typically done to rehydrate the substrate after harvesting a batch of mushrooms. It is important to use potable water, such as clean tap water, for soaking and to avoid water that may contain dirt or germs.
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Water quality: spring, distilled, bottled, rainwater
Water is necessary for the growth of mushrooms. The best water for growing mushrooms is bottled spring water as it has enough minerals and trace elements that are suitable for the health of mushrooms.
If spring water is not available, rainwater can be used as an alternative. However, rainwater collected on your roof is not recommended as it may contain harmful elements like dust, bird droppings, zinc, arsenic, chromium, lead, and chemicals that are not conducive to the growth of mushrooms. Therefore, it is best to collect rainwater in a clean place away from pollution.
Some people also suggest using tap water as it is believed that the chemicals in tap water kill contaminants. However, others argue that tap water should be avoided due to the presence of chloride, fluoride, or chlorine.
Distilled water is not recommended for mushroom growth as it lacks the nutrients required.
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Water quantity: over-watering can cause rot
Mushrooms are a type of fungus that grows in humid environments. They require a lot of water to grow and produce the best quality. However, they don't like to be soaked in it. Mushrooms need to be watered every day, and the best way to do this is by spraying them with water from a spray bottle. The water should be sprayed over the entire surface of the mushrooms so they are evenly wetted.
Mushrooms are sensitive, especially in the early phase. If they are dry for a few hours, they will stop growing and die. However, over-watering can also cause problems. Too much water can lead to mushrooms with slimy caps, and in places where water collects, black spots will appear on the mushrooms. This can eventually lead to rot. Therefore, it is important to find the right balance when watering mushrooms.
To ensure the mushrooms are getting enough water, it is recommended to water them twice daily. The best time to water is in the morning and evening. Mushrooms need to be kept moist to grow appropriately, and they become more susceptible to disease without enough moisture. However, it is important to let them dry out between waterings to avoid bacterial blotch and yellow discolouration.
When watering mushrooms, it is also important to consider the quality of the water. Good filters and clean water are essential. If using tap water, it is recommended to look into what is in the water, and consider using well water or purchasing distilled or bottled water instead.
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Air humidity and circulation are key
Mushrooms are a type of fungus that grows in humid environments. They require a lot of water to grow and produce the best quality. However, they don't like to be soaked in it. Mushrooms need to be watered every day to keep them from drying out. Over-watering can cause mushrooms to rot, while too little water will cause them to die. Therefore, it is essential to maintain the right amount of moisture in the air and the growing medium.
Air circulation is also crucial, as stagnant air can lead to mushroom growth problems. A fan can be used to circulate the air, but it is important to switch it off during spraying to ensure optimal water distribution. By controlling the air speed, quantity of air recirculated, and the amount of fresh air introduced, growers can maintain the ideal humidity levels and prevent the mushrooms from drying out.
The growing medium, such as logs, straw, or sawdust, also plays a role in air humidity and circulation. The moisture content of the growing medium should be monitored to ensure it is neither too wet nor too dry. A gravity-fed system using a network of tiny hoses can be used to moisten the medium, but it may not be effective during the final phase of mushroom growth. Therefore, it is important to understand the specific requirements of the mushroom species being cultivated.
Overall, maintaining the right balance of air humidity and circulation is critical to successful mushroom cultivation. By controlling humidity levels, providing adequate air circulation, and ensuring the growing medium is appropriately moist, growers can create the ideal environment for mushrooms to thrive.
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Frequently asked questions
Mushrooms are a type of fungus that grows in humid environments. They need to be watered at least twice a day to keep them moist and growing.
Mushrooms need a lot of water to grow and produce high-quality yields. If they are not getting enough water, they will become more susceptible to disease and will not grow.
You can water mushrooms with a spray bottle, a watering can, or a hose. The water should be sprayed over the entire surface of the mushrooms so they are evenly wet.
The best time to water mushrooms is in the morning and evening.

























