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Black Pearl Oyster Mushroom Kit

Black Pearl Oyster Mushroom Kit

Regular price $ 29.50 USD
Regular price Sale price $ 29.50 USD
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Another great oyster mushroom to try! Each black pearl oyster mushroom kit is 6 pounds of fully-colonized substrate and certified organic.

You will be able to fruit 1-3 pounds of fresh black pearl oyster mushrooms throughout the kit's lifetime of multiple months.

The black pearl oyster mushrooms grow with reckless abandonment from this kit! Okay, that may be a little of an exaggeration, because they will grow where you cut holes and spray with water. Regardless, these kits produce huge flushes! In fact, some of our customers have even remarked about having too many mushrooms after their first flush. Too many mushrooms is not that bad of a problem in our eyes. 

Our black pearl oyster mushroom kits are great to grow indoors or outside when temperatures are appropriate. However, we do recommend using oyster kits indoors when possible, as bugs can often get to the fresh mushrooms before they are harvested by human hands. 

The black pearl oyster mushroom kit is a little more advanced than some of our other oyster mushroom kits, like the blue oyster and the yellow oyster. This is not to say that the kit must be used by beginners, but the temperature and relative humidity range that the mushrooms will fruit is not as wide as the other oyster mushrooms. We discuss this further below. 

Ideal growing conditions for the black pearl oyster mushroom kit:

The ideal range is 55-60 degrees Fahrenheit with a relative humidity of 90-95%. To provide some perspective, the blue oyster mushroom’s temperature range for fruiting is in the 45-85 degrees Fahrenheit range, yet it can produce as low as 40 degrees F and as high as 95 degrees F. As you may notice with this black pearl oyster mushroom kit, the temperature range is much smaller. There is a little wiggly room, up to about 65 degrees Fahrenheit, but if you’re too far out of that range, then your black pearl oyster mushrooms will not grow. One additional note is that the humidity is a little higher than the humidity required for the blue oyster as well. 

Light: Black pearl oyster mushrooms need some light to grow, but it does not need to be a significant amount of light and it should not be direct sunlight and it. You can determine if there is enough light for your black pearl oyster mushroom kit to grow by whether or not you can comfortably read a book in the area. If you can, then the kit has enough light to produce fresh black pearl oysters. 

Humidity: You should mist your kit a few times each day so it keeps the humidity level high enough for the kit to fruit. As mentioned above, a relative humidity in the 90-95% range is ideal. You will see little baby mushrooms forming after about five or so days, and that is what we call the pinning stage. These baby mushrooms will continue to grow until they are full-sized and ready to harvest, which should be within two weeks of starting the kit. 

If you have a difficult time keeping the humidity level where you would ideally like to have it, you can try using a plastic tote or bin. Begin by placing your black oyster mushroom kit in the plastic tote with the top off. Mist the sides of the tote to keep them wet, and the bottom too if you would like. Just make sure the kit does not sit in standing water or it may lead to mold growth. Using a tote with the black oyster mushroom kit inside and a small fan blowing over the top of the tote has been a method many people have used to increase humidity levels indoors while using their yellow oyster mushroom growing kit. 

CO2 and Airflow: The levels of CO2 greatly affect the shape of the yellow mushroom fruited bodies. You need to have fresh air flow for the mushrooms or you may end up with mushrooms that grow poorly. If you noticed this, then you probably need more fresh air exchange where the kit is located. This is common in situations where people use humidity tents. Adjusting the amount of airflow will help the mushrooms normalize in their dimensions. 

Cutting holes in your kit: You will need to cut holes in the plastic that your black oyster mushroom kit comes in before you begin misting it. You can mist the substrate directly through the hole you make. We recommend using the broadside of the kit to cut the bags. The fresh mushrooms will grow towards these holes, seeking the environment of greater oxygen content. 

Learn more about black pearl oyster mushrooms:

  • The Black Oyster Mushroom is an Interesting Hybrid to Know About
  • Making a Mushroom Raft with Black Kings, Nameko, or Chestnuts
  • View full details
    Customer Reviews
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    Filter Reviews:
    Brian T.
    United States United States

    Black Pearl Oyster - Nothing grew

    I followed all your directions and after 10 days I have sawdust. Nothing is growing. My Lions main and Shitake are doing great.

    Deanna B.
    United States United States

    Christmas gift

    Hi, I ordered this for my daughter in law for Christmas. She loves them!! She couldn’t believe how big the block is.

    Marilee B.
    United States United States


    Wonderful product. The whole family had fun growing and harvesting the mushrooms.

    Steve M.
    United States United States

    Loving it!

    This has been an incredible experience. To not only grow and eat these delicious mushrooms but to also share the process with my children, family and friends has been very rewarding.

    Robert M.
    United States United States

    Awesome Mushrooms

    Everything was as described. Love the product. Quick delivery.