Blue Oyster Mushroom Grow Kit

Everything comes ready to start. The substrate block sits in an inner bag inside the printed box, and the mushrooms later grow out of its opening.

• Growing box with a 2 kg substrate block colonised with mushroom mycelium
• Spray bottle for misting the cut opening
• Instruction sheet in English
• Variety: Blue Oyster, blue oyster mushroom with grey-blue caps
• Harvest: around 1 kg of fresh mushrooms in 2, possibly 3 flushes
• Pack size: 17 x 15 x 30 cm
• Prepared 100 % naturally, made in the United Kingdom

Stand the box upright at room temperature in a bright place out of direct sunlight; do not lay it down. Push out the perforated square, then cut an X from corner to corner into the inner bag inside that opening with a sharp knife, 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. Mist only the bag and keep the box as dry as you can. The first harvest arrives around two to three weeks after opening.

The next harvests come roughly two weeks apart. The second is about half the size of the first, the third very small. For the second harvest, take the bag out of the box, stand it on a plate and mist the plate along with the X so the bag stays moist. If a mushroom grows inside the bag, make a small cut there and mist it too; it will often grow outwards.

The kit is a living natural product and will not wait forever. Keep it cool and dark until you start it, up to 1 month in the fridge: below 15 °C, below 10 °C is better, 2 to 4 °C ideal. For the best harvest, start it within a week.

After the last 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 under moist wood chips or sawdust in a shady spot outdoors; with luck, mushrooms may appear there later in the season.

What is included in the kit? A growing box with a 2 kg substrate block, a spray bottle and an instruction sheet in English.

How long until the first harvest? Around two to three weeks after you open the box, with further harvests roughly two weeks apart.

How much does the kit yield? Around 1 kg of fresh mushrooms across 2, possibly 3 harvests. The second is about half the size of the first.

Can I store the kit before starting it? Yes, cool and dark in the fridge for up to 1 month. Start it within a week for the best result.

What happens after the last harvest? The box goes into the paper recycling and the contents of the bag work well as fertiliser in the garden.