How to Grow Portobello Mushrooms Properly

Not only does Portobello contain numerous nutrients, but it also has a low rate of calories and fat, and cholesterol. For this reason, they are extremely good for our health. Moreover, Portobello mushrooms are easy-planted, so you can plant them at home just by following some tips below.

Keep on reading, and you will never have to ponder on how to grow portobello mushrooms!

How to Grow Portobello Mushrooms Indoors

Step 1: Material Preparation

How to grow Portobello mushrooms? First, you should prepare a tray for growing mushrooms. You will need a 8-inches-deep tray. Moreover, you can take advantage of some peat moss, newspaper, and compost in the process of planting.

It is not like other vegetables, mushrooms need to be grown from spores. Sounds complicated? But stay calm as they are not hard to find!  You can purchase the spores of  Portobello mushrooms online or at some local gardens.

Step 2: Planting The Mushrooms

After you have done preparing for the materials, you should use manure compost to fill the trays until it reaches 6 inches. Then, start to put the spores on the tray filled with compost, then put it down.

After that, you need a dark and cool place to place the tray. When you notice a white growth, you should immediately add peat moss and newspaper on top of it.

Step 3: Care

How to grow portobello mushrooms effectively? The answer lies in the way you take care of them. Actually, you don’t need to spend a lot of time and effort taking care of Portobello mushrooms, but that doesn’t mean you ignore them.

To be specific, the trays just need to be misted 2 times a day for 2 weeks. The ideal temperature for them to grow is  65◦ F- 70◦ F. When the heads of mushrooms grow much bigger, the newspaper layer should be removed.

If the Portobello mushrooms have not grown big enough, mist them for one more week until they are taller, and you can notice that they are growing.

Step 4: Harvest

When you remove the newspaper, Portobello mushrooms are ready to be harvested. However, if you want to have a bigger size, wait a few days. Remember to mist them frequently while you are waiting.

It is best to harvest Portobello mushrooms when their caps are curved down slightly, rather than they have flattened to a very big size. Growing indoors allows you to plant Portobello mushrooms whenever you want as you can monitor and adjust the moisture as well as the temperature.

How to Grow Portobello Mushrooms Outdoors

Step 1: Using Beds To Raise

For outdoor growing, you should prepare a bed for Portobello mushrooms. You should choose the bed with the size 4 feet in both length and wide. You can change the size to 6×8 feet if the acreage allows.

The materials needed to create the bed are wood and logs cour concrete blocks. When the beds are ready, put compost on them, like indoor growing.

However, you should use cardboard and black plastic instead of newspaper to protect the compost and fasten it to both edges for 2a couple of weeks. Placing these two layers helps to create the solar radiation effects and nourish the soil.

Step 2: Sprinkle Spores and Add Peat Moss

A couple of weeks later, you can get rid of all the layers, then just put the mushroom spores on the compost and mix them.

As soon as you notice the growth, use newspaper to cover the moss. Then, mist the mushroom 2 times daily for 10 days and avoid making them wet as it can cause mosquitoes. When the white head grows enough, remove the newspaper and keep misting them for 10 days.

Step 3: Harvest

When the head of Portobello mushrooms reach 5 inches, they can be harvested. However, the time can be flexible as it depends on your preferred size. To be sure you have Portobello mushrooms all year round, you should plant another patch of mushrooms continuing.


To sum up, it is not difficult to grow Portobello mushrooms by yourself if you know the process and apply the method appropriately. Portobello mushrooms are not only delicious but also good for our health. We hope that you can find our tips on how to grow portobello mushrooms helpful. Thank you for reading, and have a good day!

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