How to Grow Mushrooms Indoors

Are you interested in knowing how to grow mushrooms indoors? Growing mushrooms can be a rewarding and fascinating hobby that allows you to enjoy a fresh and abundant supply of these delectable fungi.

In this article📄, we will guide you through the process of growing mushrooms indoors, from selecting the right species to harvesting your bountiful crops.

How to grow mushrooms indoors

Understanding the Basics

What are Mushrooms?

Mushrooms are fungi that belong to the kingdom of Fungi. They appear in a wide variety of shapes, sizes, & colors. Mushrooms reproduce by releasing spores, which are similar to seeds in plants.

These spores germinate under suitable conditions, giving rise to mycelium—a network of thread-like structures that eventually develop into the fruiting bodies we recognize as mushrooms.

Why Grow Mushrooms Indoors?

Growing mushrooms indoors offers several advantages.

Firstly, it allows you to have control over the growing environment, ensuring optimal conditions for mushroom cultivation.

Secondly, it eliminates the dependency on seasonal changes, allowing you to grow mushrooms year-round.

Lastly, indoor cultivation provides the convenience of having fresh mushrooms readily available in your own home.

Types of Indoor Mushroom Cultivation

There are different methods of growing mushrooms indoors, each suited for specific mushroom species and personal preferences. Some common methods include:

1. Cultivating Mushrooms in Bags or Trays: This method involves growing mushrooms in plastic bags or trays filled with a suitable substrate.

2. Growing Mushrooms in Jars or Containers: Here, mushrooms are grown in glass jars or containers, creating a compact and controlled environment.

3. Using Mushroom Grow Kits: These pre-packaged kits contain everything you need to grow mushrooms, including the substrate, spores, and instructions.

How to Grow Mushrooms Indoors: Getting Started

Choosing the Right Mushroom Species

The choice of mushroom species is crucial for successful indoor cultivation. Different mushrooms have specific growth requirements, including temperature, humidity, and substrate preferences.

Some popular mushroom species for indoor cultivation include: 👇

1. Button Mushrooms (Agaricus bisporus): Known for their mild flavor and versatility in cooking, button mushrooms are an excellent choice for beginners.

2. Oyster Mushrooms (Pleurotus ostreatus): Oyster mushrooms are popular among home growers because they grow quickly & you can grow them on different variety of substrates.

3. Shiitake Mushrooms (Lentinula edodes): With their rich and smoky flavor, shiitake mushrooms are highly prized in culinary circles and are well-suited for indoor cultivation.

Gathering the Necessary Supplies

To get started with indoor mushroom cultivation, you will need the following supplies:

1. Mushroom Spawn or Spores: This serves as the starting material for mushroom cultivation. You can purchase mushroom spawns or spores from reputable suppliers or obtain them from a mature mushroom fruiting body.

2. Growing Containers: Depending on the chosen method, you will need bags, trays, jars, or containers to hold the substrate and mushrooms.

3. Substrate Materials: The substrate is the nutrient-rich material on which mushrooms grow. Common substrate options include straw, sawdust, wood chips, and coffee grounds.

4. Sterilization Equipment: Proper sterilization is essential to prevent contamination. Pressure cookers or autoclaves can be used to sterilize the substrate and containers.

5. Misting Bottle: A misting bottle will help you maintain the required humidity levels.

6. Thermometer and Hygrometer: These tools will help you monitor temperature and humidity accurately.

7. Light Source: While mushrooms don’t require light for growth, providing a small amount of indirect light can help with mushroom formation.

Creating the Ideal Growing Environment

Mushrooms thrive in specific environmental conditions. Here’s how you can create an ideal growing environment for your indoor mushroom cultivation:

1. Temperature: Most mushrooms prefer temperatures between 60°F and 75°F (15°C to 24°C). Maintain a consistent temperature within this range throughout the growing process.

2. Humidity: Mushrooms require high humidity levels—around 80% to 90%. Mist the growing area regularly to maintain the humidity levels.

3. Ventilation: Proper air circulation is essential to prevent the buildup of carbon dioxide and promote healthy mushroom growth. Ensure adequate ventilation in the growing area.

Preparing the Growing Medium

Selecting the Substrate

The substrate acts as the food source for the mushrooms. Different mushroom species have specific substrate preferences. Here are some common substrate options:

1. Straw: Straw is widely used for growing oyster mushrooms and certain varieties of shiitake mushrooms.

2. Sawdust: Sawdust is a common substrate for many mushroom species, including button mushrooms and lion’s mane mushrooms.

3. Wood Chips: Wood chips, particularly hardwood chips, are suitable for species like shiitake and oyster mushrooms.

4. Coffee Grounds: Coffee grounds are an excellent substrate choice for oyster mushrooms and can be easily sourced from local coffee shops.

Sterilizing the Substrate

Sterilizing the substrate is crucial to eliminate competing organisms and prevent contamination. Follow these steps to sterilize your substrate:

1. Prepare the Substrate: Mix the substrate materials in the desired ratio, ensuring proper moisture content.

2. Fill the Containers: Fill the growing containers with the substrate, leaving some headspace for mushroom growth.

3. Seal the Containers: Securely seal the containers with lids or filter patches to allow gas exchange.

4. Sterilization Process: Place the containers in a pressure cooker or autoclave and sterilize them at the recommended temperature and pressure for the specified duration. Follow the manufacturer’s instructions for safe operation.

Inoculating the Substrate

Inoculation refers to introducing the mushroom spawn or spores to the sterilized substrate. Follow these steps to inoculate your substrate:

1. Cool Down the Sterilized Substrate: Allow the sterilized substrate to cool to room temperature before inoculation.

2. Prepare the Spawn or Spores: If using mushroom spawn, break it into small pieces. If using spores, mix them with sterile water to create a spore solution.

3. Mix the Spawn or Spores with the Substrate: Distribute the spawn or spore solution evenly throughout the substrate material. Mix thoroughly to ensure even colonization.

4. Seal the Containers: Reseal the containers with lids or filter patches to maintain a sterile environment.

5. Incubation Period: Place the inoculated containers in a dark and warm area with suitable temperature and humidity conditions for the specific mushroom species. Allow the mycelium to colonize the substrate fully.

Maintaining Optimal Conditions

Temperature and Humidity Control

Maintaining optimal temperature and humidity levels throughout the growing process is essential for successful mushroom cultivation.

Temperature: Monitor the temperature using a thermometer and adjust the growing environment as needed. Maintain a consistent temperature within the preferred range for the chosen mushroom species.

Humidity: Mushrooms require high humidity levels. Regularly mist the growing area to maintain the desired humidity. You can also use a humidifier to control humidity levels.

Lighting Requirements

While mushrooms don’t require direct light for growth, providing a small amount of indirect light can stimulate mushroom formation.

Place the growing containers in a room with ambient light or use a low-intensity light source nearby.

Air Circulation

Proper air circulation is crucial for the health and growth of mushrooms. Stagnant air can lead to the accumulation of carbon dioxide and increase the risk of contamination.

Ensure adequate ventilation in the growing area by using fans or opening windows periodically.

Also Read: How to Grow Mushrooms at Home

Managing the Growing Process

Monitoring and Adjusting Conditions

Throughout the growing process, it’s important to monitor and adjust the conditions to ensure optimal mushroom growth. Regularly check and adjust the following:

  • Temperature and humidity levels
  • Light exposure and intensity
  • Air circulation and ventilation

Managing Pest and Disease Control

Pests and diseases can pose a threat to your indoor mushroom cultivation. Here are some measures to prevent and manage common issues:

1. Contamination Prevention: Maintain strict hygiene practices. Sterilize equipment, wash hands thoroughly, and keep the growing area clean.

2. Pest Control: Monitor for pests like mites, flies, and gnats. Use organic pest control methods or consult with an expert for suitable solutions.

3. Disease Management: If you notice any signs of fungal diseases or abnormalities, remove affected mushrooms and adjust the growing conditions accordingly.

Also Read: Why Do Mushrooms Grow in a Circle?

Harvesting and Storing Mushrooms

When the mushrooms have reached their mature stage, it’s time to harvest them. Here’s how to harvest and store your mushrooms:

1. Harvesting: Gently twist or cut the mushrooms at the base, close to the substrate. Avoid damaging the mycelium or neighboring mushrooms.

2. Post-Harvest Care: Clean the harvested mushrooms by brushing off any debris. Store them in a cool and dry place or refrigerate them in a paper bag for extended freshness.

3. Reusing the Substrate: Some mushroom species allow for multiple cycles of fruiting. After harvesting, the substrate can be reused for subsequent mushroom crops by repeating the sterilization and inoculation process.


Growing mushrooms🍄 indoors can be a rewarding and enjoyable experience. You’ll be on the right track to growing your own mushrooms at home if you follow the steps & guidelines provided in this article.

Remember to choose the right mushroom species, create the ideal growing environment, and maintain optimal conditions throughout the process.

With patience and proper care, you’ll soon be harvesting fresh and flavorful mushrooms to enjoy in your favorite dishes.

Also Read: How to Grow Portobello Mushrooms


Can I grow mushrooms indoors without any prior experience?

Absolutely! If you are a beginner, you can grow mushrooms indoors with proper guidance and the right materials.

What types of mushrooms can be grown indoors?

Several mushroom varieties are suitable for indoor cultivation, including oyster mushrooms, shiitake mushrooms, and white button mushrooms.

What are the basic requirements for growing mushrooms indoors?

Mushrooms typically require a dark and humid environment, a suitable growing medium, proper temperature and ventilation, and a sterile setup to prevent contamination.

What is the best growing medium for mushrooms?

Common growing mediums for mushrooms include sterilized straw, sawdust, or a mixture of the two. Some mushrooms also grow well on coffee grounds or hardwood logs.

How do I create the right humidity level for mushroom cultivation indoors?

You can maintain the required humidity level by misting the growing area regularly, using a humidifier, or placing trays of water nearby.

What temperature is ideal for growing mushrooms indoors?

The ideal temperature varies depending on the mushroom species, but most common varieties thrive between 60°F and 75°F (15°C and 24°C).

How long does it take for mushrooms to grow indoors?

The growth duration varies based on the mushroom species, but it typically takes around 2-4 weeks from inoculation to harvest.

Can I use a grow light for indoor mushroom cultivation?

Mushrooms do not require light for growth and development. In fact, exposure to light can hinder their growth. Therefore, a grow light is unnecessary.

How can I prevent contamination during mushroom cultivation?

Maintaining a sterile environment, using clean equipment, and properly sterilizing the growing medium are crucial steps to prevent contamination.

Is it possible to grow mushrooms indoors without a dedicated growing room?

Yes, it is possible to grow mushrooms in a designated space or even in small containers, such as buckets or trays, inside your home.

How often should I water my mushroom growing setup?

The growing medium should be kept consistently moist but not overly saturated. Regularly check the moisture level and adjust the watering accordingly.

What are common signs of mushroom harvest readiness?

Mushrooms are ready to harvest when the caps are fully developed, have opened up, and before the spores are released. Harvest them before the veil underneath the cap breaks.

Leave a Comment

eight + two =