Black pearl growkit

(Pleurotus ostreatus hybrid)


16 reviews

Grow Black Pearl mushrooms at home!

A lovely mushroom with a lots of umami and a slightly chewy texture.

Made to order

Chill before use

Harvest guaranteed

Handmade in Finland


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!

If you plan to use the Black Pearl grow kit in regular room temperature we recommend that you store the kit a couple of days in the fridge before you start it. This since Black Pearl is a mushroom that thrive in lower temperatures.

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.

Our grow kits are made at the site of our mushroom laboratory located in the Finnish countryside.
Just follow the instructions and you can enjoy fresh mushrooms grown at home in a couple of weeks time!

When making the grow kits we mix sawdust, wheat bran and water together.

When the substrate mix have been packaged into grow bags they go through sterilisation.

After the bags have been cooled down we inoculate them with mycelium that is grown on site.

That is it! No chemicals or nasty stuff!

Made to order

Mushroom mycelium is a fresh product and you will get the best results if the mycelium is as fresh as possible upon arrival.

Because of this we make all products containing mushroom mycelium to order.
If we were to keep stock of mycelium products it would in the end make for a worse product. 

The normal lead time of most products containing mycelium is 2-3 weeks.

The mycelium need some time to ”take over” or colonize the growth substrate once they have been manufactored.

Otherwise there is a risk that the mycelium would not be strong enough to survive the shipping process.

The lead time however varies and is not set in stone. 

Sometimes orders are shipped faster due to planned overproduction.

During busier periods the lead times might be longer due to production bottlenecks.

If you want your order to be delivered in a certain date range please let us know about it in the message field in the shopping cart.

We try our best to accommodate delivery date requests. 

Harvest guarantee

Cultivating mushrooms can be a challenging task.

Our growing kits however make growing mushrooms as easy at it can be.

You just need to follow the provided instructions and you can enjoy homegrown gourmet mushrooms in 1-3 weeks time.

We are so certain in our growing kits that we guarantee at least one harvest from them.

You can get multiple harvests out of a kit but later harvest are more depending on the growth environment and care given to the kit. To maximize the potential of the kits please read our in-depth guide.

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

Please note that our harvest guarantee only applies to orders shipped inside the European Economic Area.

How to use

Growing mushroom at home with a grow kit is easy. 

Just open the kit and spray it with water mist on 2-3 occasions every day and it will produce mushrooms.

We do recommend that you read our in-depth guide and check the mushroom specific growth conditions to get the most out of the kits.

Growth conditions

The following growth conditions are optimal if you want to get the best results from your Black pearl growkit

Temperature range: 15 - 21 ° C
Humidity range: 80 - 90 % RH
CO2 level: <1000 ppm
Light level: 1000-2000 lux

Black pearl is a mushroom suitable for lower temperatures.

If the ambient temperature where you plan to grow the kit is over 21 ° C the kit might not start producing mushrooms.