How To Grow Portobello Mushrooms: [Done Right]

Growing mushrooms can be fun and existing. Nevertheless, it will prove to be very tough too. With this in mind, you need to start by learning how to grow mushrooms. One of the best ways to get started is by learning how to grow a specific strain or species of mushroom.

Portobello mushrooms are a good choice because you’ll be able to grow them at home without a lot of trouble. Within this guide, you’ll learn about growing these mushrooms so you can get started immediately.

[Related Article: Growing Lion’s Mane Mushrooms: [Step By Step]

Growing Portobello Mushrooms

To grow Portobello mushrooms you’ll need to maintain the proper temperature and humidity. For the best results, you should keep the humidity between 65 and 80%. Furthermore, the temperature should be between 60 and 70.

You should create a small growing area where you’ll be able to maintain control over the temperature, lighting, and humidity with ease.

While this isn’t necessary for hobbyists, it will provide you with the best results.

Mushrooms do not need a lot of space so you can grow a few in your backyard without any trouble. More about that will be provided below.

1. The Planting Bed

You’ll want to build a planting bed so you can use it to keep control over everything. You’ll need a tray frame and you’ll be able to build it using scrap wood. Visit your local home improvement store and buy a few pieces of wood to get started.

While you can build whatever you want, it is best to build a frame that is at least 8 inches deep and 6 inches long. Once you’ve done that, you should fill the bed using manure-based compost. It should be at least 6 inches deep.

If you’re going to be growing portobellos outside, you’ll want to cover the best using black plastic. You’ll also need to sterilize the soil. Be sure to place a piece of cardboard over the compost. Then, you should cover the cardboard using a layer of black plastic.

Be sure that the plastic is tied securely so it won’t blow away. Then, you should allow the planting bed to stay outside in the sun for 2 weeks or so. This will help eliminate harmful bacteria that could potentially hurt the mushrooms.

If you intend to grow mushrooms inside, you’ll want to move the bed to a dark room. The tray can be placed in a shed, closet, or basement. As long as it is dark and the temperature stays between 50 and 70 degrees, it should be okay.

2. Mushrooms Spores

Hopefully, you already have portobello mushroom spores. If you don’t, you should be able to purchase them online. Once you’ve received them, you’ll want to mix your mushroom spores into your compost.

You’ll want to wear rubber gloves when handling the spores. The spores should be sprinkled onto the compost. Then, you’ll want to mix them into the compost about 1 inch. Push down onto the mixture until you’ve finished.

Now, you should grab a newspaper and cover the composter with it and peat moss. The newspaper should be added before the peat moss.

Be sure to mist the newspaper each day to ensure that it remains moist.

3. Wait It Out

Growing mushrooms is time-consuming but not too bad. It can take a few weeks before you’ll notice mushrooms growing in your compost. In approximately two weeks, you should remove the newspaper and check the mushrooms.

You should see small whiteheads emerging from the peat moss. If the whiteheads are visible, you should get rid of the newspaper. Do not replace it. In some cases, you may see small white streaks in the soil. If this is the case, it is normal.

It is the mushrooms taking root. In this case, you should replace the newspaper and give it another week.

With the newspaper gone and whiteheads emerging, you’ll need to continue misting the mushrooms as they grow. Remember to mist them with a spray bottle each day. In most cases, the mushrooms will be fully grown in 10 days or so.

You can likely harvest them sooner but you should be patient. There is no reason to rush the process unless you want to start again.

4. Harvesting

Portobello Mushrooms

Finally, it is time to harvest the portobello mushrooms. To get started, you’ll want to wear rubber gloves. Once the caps have fully unfurled, you should dig out the mushrooms. These mushrooms have reaches maximum growth when they’re 4 to 6 cm in diameter.

You can give them out using your hands. Just make sure that you’re wearing rubber gloves. Once you’ve removed them from the soil, you’ll want to clean them using a damp paper towel. Then, you can store the mushrooms in a brown paper bag inside of your fridge.

You have to be cautious when harvesting portobello mushrooms. If you move too early, you’re going to be harvesting criminis and not portobellos. If you want portobellos, you should not harvest the mushrooms until the edges are flat.

If they’re curled, you’re dealing with crimini mushrooms. If you want to continue growing mushrooms, you should moisten the compost and do it all over again. You can normally get 2 or 3 batches from a single tray.

What Are Portobello Mushrooms

First, you should learn a little more about portobello mushrooms. You’ll discover that portobello mushrooms are often referred to as portobello and portabello mushrooms. Regardless of the name, they’re a mature form of cremini mushrooms.

They’re large and dark brown. Furthermore, they’ll have an open cap with brown gills on the bottom. You’ll be able to see these easily. Since the portobello mushroom has been given more time to grow, it has less moisture than younger alternatives.

Portobello mushrooms are drier than cremini mushrooms.

They have a strong flavor though. Once you’ve familiarized yourself with portobello mushrooms, you’ll be able to identify them quickly and easily. You’ll also find that their strong flavor makes them a good choice for cooking.

Why Portobello Mushrooms

Why would you want to grow portobello mushrooms? Why wouldn’t you want to stick with one of the other varieties? Well, you’ll find that this specific type of mushroom offers various benefits. For instance, these mushrooms contain a lot of nutrients.

When you eat them, you’ll acquire vitamin B, protein, fiber, and minerals. Furthermore, you’ll appreciate the fact that they’re low in calories and fat. They’re also free of cholesterol. This makes these mushrooms much better than others.

Whether you’re a vegetarian or you’re trying to lose weight, you should eat more of these mushrooms. Doing so will pay off dividends.

Where Do Portabella Mushrooms Grow

Portabella mushrooms are a type of mushroom that grows in a wide variety of locations. They can be found in damp, dark places such as forests or caves. Portabella mushrooms are also commonly cultivated in many parts of the world.

The climate and soil type play a big role in determining where these mushrooms will grow best. In general, portabella mushrooms prefer warm weather and moist soil.

The Origin Of Portobello Mushrooms

Portobello mushrooms have been around for a long time. They’re a member of the Agaricus bisporous family. This edible mushroom was first discovered in Europe.

Again, this is the mature form of the crimini mushroom which is also known as the button mushroom.

These mushrooms tend to be harvest commonly when they’re smaller. By the time they mushroom grows 4 to 6 inches, they become portobello mushrooms. It is often said that these mushrooms were first grown by Americans after bringing spores from Italy.

The New York Times mentioned these mushrooms for the first time during the mid 1908s. If you’re interested in growing these mushrooms, you’ll be able to do so.

However, you’ll need to learn more about their habitat and requirements.


Growing portobello mushrooms doesn’t have to be difficult. With the right setup and supplies, you can turn a few spores into delicious, healthy portobello mushrooms.

There are tons of recipes that call for mushrooms.

These recipes include salads, soups, different kinds of pastas, pizzas, sandwiches, and burritos. A few slices of your fresh portobello mushrooms will go a long way in enhancing the flavor of all your homemade recipes.

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