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How to Grow Oyster Mushrooms at Home: The Ultimate Guide


Growing oyster mushrooms at home is an easy and rewarding process that allows you to enjoy fresh, delicious mushrooms anytime you want. This guide will walk you through the steps of growing oyster mushrooms at home using different substrates and provide you with helpful tips for a successful harvest. By following these simple instructions, you'll soon be able to enjoy your very own homegrown oyster mushrooms.

Getting Prepared

Before you begin, you'll need to decide which substrate to grow your oyster mushrooms on and gather the necessary supplies. Common substrates for oyster mushrooms include straw, cardboard, sawdust pellets, and coffee grounds.

Supplies you'll need

  • Oyster mushroom grain spawn
  • Substrate of your choice (straw, cardboard, sawdust pellets, or coffee grounds)
  • A sterilized container or bag for inoculation

Preparing Your Oyster Mushroom Substrate

Depending on the substrate you choose, the preparation method will vary:

a. Straw and Cardboard

Soak the straw and cardboard in water overnight to ensure they are thoroughly damp. Drain any excess water before using the substrate.

b. Sawdust Pellets

Soak sawdust pellets in water until they expand, then drain any excess water.

c. Coffee Grounds

Used coffee grounds from your local coffee shop or your own home can be used as a substrate. Make sure they are damp but not overly wet.


Once your substrate is prepared, it's time to inoculate it with the oyster mushroom spawn. Mix the grain spawn with the damp substrate, then transfer the mixture into a sterilized container with holes or a bag with a breathable filter patch. Seal the bag or container and place it in a dark, warm, and humid environment, such as a cupboard or closet, with a temperature between 20-25°C (68-77°F).


Allow the oyster mushroom mycelium to colonize the substrate for approximately two to three weeks. During this time, you should see the mycelium growing and spreading throughout the substrate. Be sure to keep an eye on the incubating substrate and watch for any signs of contamination, such as green mold or other unwanted organisms.


Once the mycelium has fully colonized the substrate, it's time to initiate fruiting. Move the colonized substrate to a well-lit area with indirect sunlight, such as a windowsill or greenhouse. Ensure the area has proper air circulation and a humidity level of around 70-80%.

To encourage the growth of mushrooms, cut small slits into the cultivation bag, allowing the mushrooms to grow through the openings.

Important fruiting factors to consider:

  • Light: Oyster mushrooms require indirect sunlight or a source of diffused light to grow properly.
  • Fresh Air: Maintaining proper air circulation is essential for healthy mushroom growth. Ensure the growing area has a source of fresh air.
  • Humidity: Maintaining a humidity level of around 70-80% is crucial for successful fruiting. You can achieve this by misting the growing area or using a humidifier.
  • Temperature: Oyster mushrooms thrive in temperatures between 12-18°C (54-64°F), so be sure to maintain this range during fruiting.

Harvesting and Growing More Crops

After 5-10 days, you should see fully developed oyster mushrooms ready for harvesting. Gently twist the mushrooms off the substrate or cut them with a clean knife.

You can continue to fruit your substrate for several more weeks, as it will likely produce multiple flushes of mushrooms. After the initial flush, you may notice a decrease in the size and quantity of mushrooms produced in subsequent flushes. This is normal, as the substrate becomes depleted of nutrients over time.

To grow more oyster mushrooms, simply repeat the process with a new batch of substrate and oyster mushroom grain spawn.

Health Benefits of Oyster Mushrooms

In addition to being a delicious and versatile ingredient in various culinary dishes, oyster mushrooms offer numerous health benefits. They are low in calories, high in fiber, and packed with essential vitamins and minerals, such as vitamin D, vitamin B, and potassium. Oyster mushrooms also contain antioxidants and have been shown to have immune-boosting properties.


Growing oyster mushrooms at home is a fun and rewarding hobby that can provide you with a fresh supply of nutritious and delicious mushrooms. By following this guide and paying attention to the key factors affecting mushroom growth, such as light, fresh air, humidity, and temperature, you'll be well on your way to enjoying the fruits of your labor. So, gather your supplies, choose your substrate, and embark on the journey of growing oyster mushrooms at home.

Now it's your turn

Are you ready to start growing your own oyster mushrooms at home? With the information provided in this guide, you're well-equipped to begin your mushroom-growing adventure. We'd love to hear about your experiences and any tips or tricks you've discovered along the way. Share your stories in the comments below, and happy mushroom farming!