Black Pearl Oyster Mushroom Grow Kit
CHF 29.95
This product will be released on 25 November 2026
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This mushroom grow kit lets you raise Black Pearl oyster mushrooms on your own kitchen worktop. Inside the printed cardboard box sits an inner bag holding a 2 kg substrate block already run through with mushroom mycelium. You cut an X into the bag, mist the opening several times a day, and after two to three weeks the first clusters push their way out. Black Pearl has dark brown to almost black caps with pale gills.
The kit is made in the United Kingdom and prepared 100 % naturally. It suits keen home cooks, mushroom lovers and anyone who wants to watch something grow without having a garden. The block gives 2, possibly 3 harvests, around 1 kg of fresh mushrooms in total. Children can do the daily misting and watching while an adult handles the sharp knife. A living natural product sits inside the bag, so start the kit soon after it arrives.
Apart from water and a sharp knife you need nothing else. The instruction sheet covers the five steps and is written in English.
- Growing box with a 2 kg substrate block in an inner bag
- Spray bottle
- Instructions in English
- Variety: Black Pearl, an oyster mushroom
- Harvest: around 1 kg across 2, possibly 3 flushes
- Box dimensions: 17 x 15 x 30 cm
- Made in the United Kingdom
Stand the box upright in a bright spot at room temperature, out of direct sunlight, and do not lay it on its side. Push out the perforated square in the card. With a sharp knife, cut an X from corner to corner into the inner bag inside that opening, without cutting deep into the block. Fill the spray bottle with water and mist the X generously 2 to 4 times a day so the block does not dry out, aiming at the bag only and keeping the cardboard dry. Then wait: the first harvest comes around two to three weeks after opening.
After the first harvest, more follow roughly two weeks apart. The second is about half the size of the first, the third very small. For these later flushes, take the bag out of the box, stand it on a plate and mist the plate as well as the X, so the bag stays moist.
Before you start, the kit keeps in the fridge for up to 1 month. Cool and dark below 15 °C works, below 10 °C is better, and 2 to 4 °C is ideal. For the best harvest, start it within a week.
If a mushroom grows inside the bag rather than at the opening, make a small cut there and mist that spot too; it will often grow outwards. After the final harvest the box goes into the paper recycling, and the contents of the bag make a good fertiliser for the garden. You can also crumble the block and mix it outdoors in a shady place under damp wood chips or sawdust; with a bit of luck, mushrooms appear there later in the season.
How long does the first harvest take? Around two to three weeks after opening. Further flushes follow roughly two weeks apart.
How many mushrooms does one kit produce? Around 1 kg of fresh mushrooms over 2, possibly 3 harvests. The second is about half the size of the first.
How often do I need to mist the kit? Generously 2 to 4 times a day onto the X opening, so the substrate block stays damp.
Can I store the kit before starting it? Yes, for up to 1 month in the fridge. For the best harvest, start it within a week.
What do I do after the last harvest? The box goes into the paper recycling and the bag contents make a good fertiliser for the garden.
Fungimental is a small mushroom grower from Beaminster in Dorset, in the south-west of England. The brand grows edible mushrooms and puts its know-how into grow kits that let oyster mushrooms, lion's mane and other varieties sprout right in your kitchen: open the box, cut a cross into the bag, mist it every day and harvest fresh mushrooms a few weeks later. The kits are made in England, and after the last harvest the substrate still makes a good fertiliser for the garden.
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