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How to Water Mushrooms – GIY Plants

Person misting mushroom kit, showing how to water mushrooms.

The purpose of growing mushrooms may vary, but one thing is sure: water is the key to mushroom growth. This comprehensive guide explores how to water mushrooms for fruitful harvests.

Understanding the Importance of Water for Mushroom Growth

In the world of mushroom cultivation, the significance of water is paramount. The fact is simple: mushrooms are 90% water. This understanding underscores the necessity of adequate water for successful mushroom production. Nevertheless, unlike many plants, mushrooms’ watering needs are distinct and unique.

The Role of Mushroom Species in Watering

Three different mushroom species growing kits next to window.

It’s vital to recognize that different mushroom species have varied water requirements. For example, the oyster mushroom, a common choice in many mushroom grow kits, relies on proper watering. Therefore, familiarizing yourself with the watering needs of your specific mushroom species is crucial for a thriving mushroom farm.

Ideal Way to Water Mushrooms

Overwatering mushrooms can be as harmful as not providing enough water. In essence, mushrooms require a moist environment, not a drenched one. We suggest using a spray bottle as the best tool to water mushrooms.

This method allows you to deliver a gentle mist to your mushrooms twice daily, creating a moist but not soaked environment. Remember, the goal is to hydrate your mushrooms, not to drown them.

The Timing of Watering Mushrooms

The schedule of watering mushrooms is as essential as the amount of water used. Typically, watering mushrooms should happen at least twice a day. The best time to water mushrooms is once in the morning and once in the evening.

However, when the air is drier, you may need to water mushrooms 4-5 times daily to preserve ideal moisture levels.

Choosing the Best Water for Mushrooms

Guy filling up a jug with spring water for watering mushrooms.

The water source used to hydrate your mushrooms can significantly impact their growth. Tap water contains chemicals like chlorine, which could impede mushroom growth. Using a chlorine-free water source, such as spring water, to water your mushrooms is essential.

The Role of Humidity in Mushroom Growth

The importance of humidity levels in mushroom growth cannot be overstated. Humidity is the moisture present in the air, and mushrooms flourish in high humidity levels, typically between 80-95%. Regular watering using a spray bottle hydrates the mushrooms and helps maintain these ideal humidity levels.

Watering Needs at Different Mushroom Growth Stages

The watering requirements for mushrooms change throughout different stages of their lifecycle. For instance, baby mushrooms, also referred to as “pins,” need more frequent watering to prevent them from drying out. On the other hand, large mushrooms or mature mushrooms can handle less water.

Keeping a Close Eye on Your Mushroom Growth

Oyster mushroom kits with lots of growth.

Monitoring your mushrooms is a vital part of mushroom farming. If you observe that your mushrooms stop growing or their mushroom caps appear dry, they may need more water. Conversely, if you notice the mushrooms or the substrate they grow on appear waterlogged, you might be overwatering.


Mastering how to water mushrooms can transform your success in mushroom cultivation. The right water source, watering schedule, and humid environment are the trifecta for healthy and productive mushroom growth. Armed with this guide, we hope you know how to water your mushrooms effectively.

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