The Black Pearl (Pleurotus ostreatus hybrid) mushroom is something truly special.
It is a hybrid between King oysters and Grey oysters.

It produces wonderfully chewy mushrooms like the king oyster but they grow as fast and agressively as the grey oyster.
Perfect for home cultivators!

For the best results and the faster growth we recommend that you store the kit a couple of days in the fridge before you start it.

The cold initiates the mushroom growth and if you don't give the kit a cold shock it might take a long time for the mushrooms to start developing.

Black pearl growkit

Black pearl growkit




Open the box at the marked line.


Cut the bag in the box open in the same way as in the illustration.

Do not make the opening too big!


Spray the mushrooms with water multiple times per day.

5-8 sprays with the bottle every time you water usually is enough.


Pick the mushrooms when the edge of the cap starts to flat out.

Enjoy your mushrooms!


Latin name

Pleurotus ostreatus hybrid


15 - 21 ° C


80 - 90 % RH

Light level

1000 - 2000 lux

CO2 level

< 1000 ppm

Cooking tips


Black pearl growkit


Why would I want a grow kit?

They are easy to use

Our mushroom growing kits takes most of the work out of growing mushrooms.

You just have to open it and spray it with water 2-3 times per day.

After around 1-3 weeks you can enjoy tasty homegrown mushrooms!

You get unique mushrooms

When we develop grow kits we choose mushroom species that are delicious but not that common.

Most of the mushrooms that we make growing kits of are considered niche and won't likely be found in your local supermarket.

We want to bring something new to the table.

It is a fun experience

Watching mushrooms growing is a fun and kind of mesmerizing experience.

It is a perfect gift to give a loved one.

When the mushrooms start growing they grow fast and can almost double in size in a day!

You don't believe us?
Check out the timelapses on the product pages.

We guarantee the harvest

We guarantee that you will get at least one harvest from your kit.

No greeen thumbs needed!
Just follow the growkit instructions.

If you for some reason don’t get an harvest even if you followed the instructions we will send you new kits or refund you.

They are made in Finland

Some of you might have heard the conspiracy theories that Finland doesn't exist.

We beg to differ.
Finland does exist and it is kind of cold and lonely here.

All our products are made by hard working people in Finland.

We use the cleanest possible ingredients and all our products bear the key flag as a sign of Finnish craftmanship.

They are made to order

Mushroom mycelium produces the best harvests if used as fresh as possible.

Because of this we make all growkits on demand so we can ensure that you recieve the best possible product.

The production time for a growkit is between 2 to 3 weeks.

Black pearl growkit