The Beginner’s Guide to Growing Oyster Mushrooms at Home

Growing oyster mushrooms at home has become increasingly popular in recent years as people are looking for sustainable food options and ways to grow their own produce. Oyster mushrooms are a great choice for beginners because they are easy to grow, have a delicious taste, and are packed with nutrients. In this article, we will provide a comprehensive guide on how to grow oyster mushrooms at home, from getting started to harvesting and storage.

Getting Started

Before getting started with growing oyster mushrooms at home, it is important to gather the necessary equipment and supplies. The following items will be needed:

  • Substrate: Oyster mushrooms grow best on straw-based substrates. You can purchase straw from a local farm or hardware store, or use other organic materials such as sawdust, coffee grounds, or even paper waste.
  • Mushroom Spawn: Mushroom spawn is the vegetative part of the mushroom that will be added to the substrate to start the growing process. You can purchase mushroom spawn online or from local mushroom farms.
  • Containers: Oyster mushrooms can be grown in various types of containers, such as grow bags or plastic containers.
  • Other materials: Gloves, a spray bottle, and a thermometer are also necessary for growing oyster mushrooms at home.

Preparing the Substrate

The first step in preparing the substrate is to pasteurize or sterilize it. Pasteurization involves heating the substrate to a certain temperature for a specific amount of time to kill off unwanted bacteria and other microorganisms. Sterilization involves using a pressure cooker to sterilize the substrate. Both methods are effective in preparing the substrate for growing oyster mushrooms.

After the substrate has been pasteurized or sterilized, it is important to add nutrients to it to provide the oyster mushrooms with the necessary food to grow. You can add nutrients such as bran, gypsum, or even coffee grounds to the substrate. Mix the nutrients thoroughly into the substrate to ensure even distribution.

Inoculating the Substrate

Once the substrate has been prepared, it is time to inoculate it with mushroom spawn. There are different ways to inoculate the substrate, including using liquid culture or grain spawn. Liquid culture involves adding a small amount of mushroom spawn to a liquid medium, which is then poured onto the substrate. Grain spawn involves adding mushroom spawn to sterilized grains, such as rye or wheat, and then adding the grain spawn to the substrate.

Once the mushroom spawn has been added to the substrate, it is important to mix it thoroughly to ensure even distribution. Cover the substrate with a layer of plastic or another material to help retain moisture.

Caring for Your Mushrooms

Oyster mushrooms require specific conditions to grow properly. They need a temperature range of 18-24°C (64-75°F) and high humidity levels. Light is not necessary for oyster mushrooms to grow, but indirect light can be beneficial. It is also important to keep the substrate moist by misting it with water daily.

As the mushrooms begin to grow, they will start to form small, white bumps on the surface of the substrate. These bumps will eventually turn into the fruiting bodies of the mushroom. Once the mushrooms are fully grown, they will start to turn gray and become more delicate. At this point, they are ready to be harvested.

Harvesting and Storage

Once your oyster mushrooms have fully grown, it’s time to harvest them. Oyster mushrooms have a short harvest window, so it’s important to check them frequently once you see the first signs of fruiting. Here’s what you need to know to harvest and store your oyster mushrooms:


  • Look for fully matured mushrooms with caps that have started to curl upward.
  • Gently twist and pull the mushroom stem at the base, making sure to avoid damaging the substrate.
  • Cut away any remaining bits of stem with a sharp knife or scissors.
  • Avoid picking the mushrooms by hand as this may cause damage to the fruiting body and the substrate.


  • Oyster mushrooms can be stored in the refrigerator for up to a week. Place them in a paper bag or wrapped in a paper towel to absorb any excess moisture.
  • For longer storage, you can dry or freeze your oyster mushrooms.
  • To dry your mushrooms, slice them thinly and place them on a baking sheet in a low oven (around 140-150°F) for several hours until they are completely dry and crispy. Alternatively, use a dehydrator set to 140-150°F for 4-6 hours.
  • To freeze your mushrooms, simply clean and slice them, then store them in a freezer-safe bag or container for up to six months.

It’s important to note that homegrown mushrooms should be consumed as soon as possible after harvesting to ensure the best flavor and freshness.

Growing oyster mushrooms at home can be a fun and rewarding experience. With a few basic supplies and some patience, you can enjoy a steady supply of delicious and nutritious mushrooms throughout the year. Whether you’re looking to reduce your carbon footprint, practice sustainable living, or just want to try something new, mushroom cultivation is a great hobby to explore. So go ahead, get started on your mushroom growing journey today!

If you plan on using your oyster mushrooms in dishes that require cooking, you can also freeze them for later use. To freeze your mushrooms, clean them thoroughly, chop them into small pieces, and spread them out on a baking sheet. Place the sheet in the freezer and let the mushrooms freeze completely. Once frozen, transfer them to a freezer-safe bag or container and store in the freezer for up to 6 months.

It’s important to note that while oyster mushrooms are generally safe to eat, there have been cases of people experiencing allergic reactions to certain varieties. If you’re trying oyster mushrooms for the first time, it’s recommended to start with a small portion and monitor your body’s reaction. If you experience any symptoms such as itching, hives, or difficulty breathing, stop eating the mushrooms immediately and seek medical attention.

Growing oyster mushrooms at home is a fun and rewarding hobby that can also provide a sustainable source of food. With the right equipment and knowledge, anyone can successfully grow their own mushrooms right in their own home. Start by gathering the necessary supplies, preparing the substrate, inoculating it with spawn, and then carefully monitoring the growth and care of your mushrooms. Once they are ready, enjoy the fruits of your labor by adding your homegrown oyster mushrooms to your favorite recipes. Happy growing!

Storing Oyster Mushrooms

Once you have harvested your oyster mushrooms, it’s important to store them correctly to ensure that they remain fresh and flavorful for as long as possible. Here are some tips for storing oyster mushrooms:

  1. Store them in the fridge: Oyster mushrooms can be stored in the fridge for up to a week. To store them, place them in a paper bag or a container lined with a paper towel to absorb any excess moisture.
  2. Freeze them: Oyster mushrooms can be frozen for up to 6 months. To freeze them, simply clean and slice the mushrooms and place them in a resealable freezer bag.
  3. Dehydrate them: Oyster mushrooms can also be dehydrated and stored for later use. To dehydrate them, slice the mushrooms and place them on a baking sheet. Dry them in the oven at 150°F (65°C) for several hours until they are completely dry and crispy. Store the dehydrated mushrooms in an airtight container.

Growing oyster mushrooms at home is a fun and rewarding activity that can provide you with fresh, delicious mushrooms for your culinary creations. With the right supplies, substrate, and techniques, anyone can grow oyster mushrooms in their own home. Remember to keep your growing area clean and sterile, and monitor the temperature and humidity levels to ensure the best growing conditions for your mushrooms. And don’t forget to harvest and store your mushrooms correctly to get the most out of your homegrown harvest.

How long does it take to grow oyster mushrooms?

The growing time for oyster mushrooms varies depending on the type of substrate, temperature, humidity, and other factors. On average, oyster mushrooms take about 2-3 weeks to grow from the time of inoculation to harvest. However, it can take longer or shorter depending on the conditions.

What is the best substrate for growing oyster mushrooms?

Oyster mushrooms can grow on a variety of substrates, but some of the most popular options include straw, sawdust, coffee grounds, and cardboard. Straw is a common and affordable substrate that can be easily pasteurized, making it a good option for beginners.

How much light do oyster mushrooms need to grow?

Unlike plants, oyster mushrooms do not require light to grow. They can actually grow in complete darkness. However, some growers expose their mushrooms to light for a short period of time to encourage the development of pigments in the caps.

Can oyster mushrooms grow without spawn?

Technically, it is possible to grow oyster mushrooms without using spawn, but it is much more difficult and time-consuming. Spawn is necessary to inoculate the substrate with mycelium, which is the vegetative part of the fungus that produces the mushrooms.

How often should I water my oyster mushroom substrate?

The frequency of watering depends on the substrate and the environment. In general, oyster mushroom substrates should be kept moist but not waterlogged. Watering once a day is usually sufficient, but it’s important to monitor the substrate and adjust as needed.

Can oyster mushrooms grow indoors?

Yes, oyster mushrooms can be grown indoors. In fact, indoor cultivation is becoming increasingly popular as more people are interested in home gardening and sustainable food practices. All that is needed is a small growing space and proper environmental conditions.

What are the benefits of growing oyster mushrooms at home?

Growing oyster mushrooms at home is a sustainable and environmentally friendly way to produce fresh and nutritious food. It also allows for greater control over the growing process and reduces the carbon footprint associated with transporting produce from farm to store.

Can I reuse the substrate to grow more mushrooms?

Yes, it is possible to reuse the substrate to grow more mushrooms, but it is important to properly pasteurize or sterilize it first to eliminate any potential contaminants. Reusing the substrate can also lead to reduced yields, so it’s important to monitor the health of subsequent mushroom crops.

How do I prevent contamination in my mushroom growing setup?

Contamination can occur at any stage of the growing process, so it’s important to maintain a clean and sterile environment. Some tips for preventing contamination include washing your hands before handling the substrate or mushrooms, using a clean and dedicated growing space, and properly sterilizing or pasteurizing the substrate.

Can I grow oyster mushrooms in a greenhouse?

Yes, you can grow oyster mushrooms in a greenhouse. However, you need to ensure that the temperature and humidity levels are maintained properly. A greenhouse provides an ideal environment for mushroom cultivation because it can protect the mushrooms from extreme temperatures and harsh weather conditions. You can grow oyster mushrooms using the same techniques as growing them indoors, but you may need to adjust the temperature and humidity levels based on the climate in your area.

How long does it take to grow oyster mushrooms?

The time it takes to grow oyster mushrooms varies based on various factors such as temperature, humidity, and type of substrate. On average, it takes around 2-4 weeks for the mycelium to colonize the substrate and another 1-2 weeks for the mushrooms to grow. However, the growth rate can be faster or slower depending on the specific conditions of your growing environment.

How many times can you harvest oyster mushrooms?

You can usually harvest oyster mushrooms two to three times before the substrate loses its ability to produce more mushrooms. The first harvest is usually the largest, followed by subsequent flushes of smaller mushrooms. Once the mushrooms have been harvested, it’s important to remove any remaining mushroom stems or debris and sanitize the growing area to prevent contamination and prepare for the next flush.

How do I troubleshoot problems when growing oyster mushrooms?

Common problems when growing oyster mushrooms include contamination, mold growth, and low yield. If you encounter any issues, it’s important to identify the root cause and take corrective action quickly. To troubleshoot, first assess the growing conditions such as temperature, humidity, and light. Check the substrate for any signs of contamination or mold growth, and if necessary, adjust the temperature and humidity levels. If the problem persists, you may need to start over with fresh substrate and mushroom spawn.

What are the nutritional benefits of oyster mushrooms?

Oyster mushrooms are low in calories and high in protein, making them a nutritious addition to any diet. They are also a good source of fiber, vitamins B and D, and minerals such as potassium and phosphorus. Additionally, they contain compounds such as polysaccharides and beta-glucans that have been shown to have anti-inflammatory and immune-boosting properties.

How do I preserve oyster mushrooms?

Oyster mushrooms can be preserved through drying, freezing, or canning. To dry them, simply slice the mushrooms thinly and lay them out on a drying rack or in a dehydrator until they are fully dried. To freeze them, blanch the mushrooms for 3-5 minutes, then drain and freeze in an airtight container. To can them, slice the mushrooms and pack them into canning jars with a brine solution before processing in a pressure canner.

Can I grow oyster mushrooms from store-bought mushrooms?

While it is possible to grow oyster mushrooms from store-bought mushrooms, it’s not recommended because they may be contaminated with bacteria or other pathogens that can affect the growth of your mushrooms. It’s best to purchase high-quality mushroom spawn from a reputable supplier to ensure that you have a healthy and successful crop.

Can oyster mushrooms be grown outdoors?

Yes, oyster mushrooms can be grown outdoors, but they require specific conditions to thrive. Outdoor mushroom cultivation is best done in a shady area that is protected from direct sunlight and harsh weather conditions. The substrate should also be protected from pests and other animals that may try to eat the mushrooms. It’s important to ensure that the substrate stays moist, but not too wet, and that it is protected from excessive rainfall.

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