How to Grow Portobello Mushrooms? Discover the Appropriate Way!

If you are a beginner in terms of gardening or simply growing plants, Portobello Mushroom is one of the plants that are ideal for you to try to grow. However, the question remains, and you might be curious about how to grow Portobello Mushrooms?

This process is surprisingly more straightforward than it seems. It is in truth a non-complicated and fun process to go through. Portobello Mushrooms are plants that are easy to grow compared to other plants.

Best of all, they also require low maintenance. You can choose to grow Portobello Mushrooms either indoors or outdoors. In this article, I will share with you the effective ways on how to grow Portobello Mushrooms. Furthermore, I will discuss a few essential tips along the way.

What You Will Need

Before I share with you the steps on how to grow Portobello Mushrooms, there are vital materials that need for this project. Here are the following essentials that you will require.

How to Grow Portobello Mushrooms
  • Portobello mushroom spores: These will be planted unto your bed to grow Portobello Mushrooms.
  • Compost: This is will be used a bed for growing your Portobello Mushrooms
  • Damp moss: This can be peat moss or any moss you have access to.
  • Tray (measuring 8 inches deep and 4 inches long x 4 inches wide): This can be built from any available material around your home. 
  • Cardboard or Newspaper: This will be used to cover your compost bed while promoting the growth of your Portobello Mushrooms
  • Water: This is essential for growing any types of plants.

How To Grow Portobello Mushrooms?

Once you have obtained the essential materials for this project, you may now carry on to follow the straightforward guide. Here are the steps on how to grow Portobello Mushrooms.

Growing Portobello Mushrooms Indoors

How to Grow Portobello Mushrooms

1. The first step in this process is to make a bed for your mushrooms. Using the tray, fill it with compost of around 6 inches deep. Collect your Portobello Mushroom spores and sprinkle them all over the compost bed. Gently push each spore downward unto the compost bed.

2. Once this is done, place the tray in a dark room with the room temperature of 60 to 80 degrees Fahrenheit. Let it sit there until you notice microscopic, white buds emerging.

3. Next is to add a layer of damp moss over the entire compost bed. After which you need to cover it with newspaper.

4. Spray water on the covered bed twice a day. This will run for the next two weeks.

5. Check your bed and see if there are now little heads that emerged. If you notice they have emerged successfully, you may take off the newspaper covering for good.

On the other hand, if this still does not happen, replace the covering with a new sheet of newspaper and continue with spraying water twice a day for another week.

6. At this point that little heads began emerging, you just need to continue spraying water once a day.

7. Once you Portobello Mushrooms are large enough, you can proceed to harvest them.

Growing Portobello Mushrooms Outdoors

How to Grow Portobello Mushrooms

1. When growing Portobello Mushrooms outdoors, start by building your bed. This should measure 4 inches in length and width and 8 inches deep.

2. Once your bed is made, fill it up with 6 inches deep of compost.

3. Using the cardboard, cover the bed with it. Follow this by covering the whole bed with black plastic. This is done to encourage solar radiation that helps sterilize your compost bed. Leave your bed like this for the next two weeks.

4. At the end of two weeks, take off the black plastic as well as the cardboard. Now, sprinkle your Portobello Mushroom spores across your compost bed. Again, gently work them into the compost by nudging them downward lightly.

Let this sit for another two weeks. Make sure that the environment temperature is around 60 to 70 degrees Fahrenheit.

5. After those two weeks, you will notice tiny heads starting to pop out. This time you need to cover the entire surface of the bed with 1 inch of damp moss. Afterward, cover it with newspaper. Spray water twice a day for the next ten days.

6. When you notice that your Portobello Mushrooms are large enough, you can opt to harvest them.

To know more about this, watch this short video:

Additional Tips for Growing Portobello Mushrooms

How to Grow Portobello Mushrooms
  • To promote successful growth for your Portobello Mushrooms, you have to ensure that they have stable environment temperature and moisture. Fresh air and cooler temperature play a vital role to stimulate their healthy growth.

  • To monitor the environment temperature for your Portobello Mushrooms, you can opt to use a thermometer. The appropriate temperature should be around 60 to 80 degrees Fahrenheit.

  • Watering your Portobello Mushrooms regularly is also essential to their successful growth. You can use tap water for this, but your best option is purified or distilled water.

  • The process of growing Portobello Mushrooms indoors is easier especially if you are a beginner. This allows you to easily monitor the room temperature and check as often as you can.

What You Need to Know about Portobello Mushrooms

How to Grow Portobello Mushrooms

Portobello Mushrooms have achieved popularity and is considered as a superfood. This means that they are not only known to be delicious, they are also packed with many nutrients.

With a scientific name of Agaricus Bisporus which means gilled mushrooms, Portobello Mushrooms are known to be one of the broadest types of all mushrooms. They are known to grow at around six inches.

It is dubbed as gilled mushroom for the reason that it has a distinct feature that makes it stand out easily which are gills. These gills appear like webs underneath its cap. Known also for its succulent taste, Portobello Mushrooms can be found on many food menus that most people enjoy today.

When grilled, they typically have a meaty and tender texture which also makes it the best substitute for real meat in some dishes. Because of it is very delicious and nutritious, Portobello Mushrooms easily became a preferred ingredient.

Be that as it may, they are also a bit pricey which makes it a benefit if you can grow them yourself. Portobello Mushrooms are also used by vegans to serve as meat to their dishes. In addition to that, they are a superb ingredient to salads, omelets, pasta, soups, and casseroles.


Portobello Mushrooms are without a doubt a remarkable plant. It is one of the favorite ingredients for many dishes because of its succulent taste, versatility, and nutritional value. However, it is also known to be expensive.

Now that you have learned the ways on how to grow Portobello Mushrooms, this makes it a very substantial advantage for you. You can follow these steps and be on your way to enjoying your bountiful Portobello Mushroom harvest.

Was this article helpful? Were you able to learn and understand the steps on how to grow Portobello Mushrooms? Do you find the additional tips useful? Do you have any other suggestions regarding this topic?

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Dan Harris

Hi. I'm Dan Harris. My wife and I started gardening 5 years ago. Neither one of us had any gardening background but we loved the idea of growing our own organic food. Over the years, our garden has almost doubled in size and I’ve learned a lot from my season’s successes and failures. I’ve been excited to share my own beginning knowledge and special skills with all garden lovers.

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