Description
About This Kit
1KG
Yield: 400g
Our 1 kg kits are premade and ready to go. No waiting, no lead time. If you just don’t want to wait around, this is the one. No fancy box, no unnecessary packaging — just a fresh, ready-to-fruit bag.
3KG
Yield: 1,500g
Our 3 kg kits are made fresh to order. We prepare your bag, wait for it to reach 60–70% colonisation, then send it straight to you. No fancy box, no endless sitting in cold storage.
Lead time (mentioned in the listing above “add to cart” button) means time it takes to prepare this order. Product in stock does not mean its ready to send out, it means it can be prepared in the lead time mentioned.
Zero Maintenance Kit
Everything you need is included — just add water and follow the simple instructions.
Our substrate is a special Master’s Mix: a blend of sawdust and lupin hulls, inoculated with 300g of millet grain spawn to give your mushrooms the best possible start.
Microplastic Free
Soy Allergen Free
Gluten Free
This hybrid variety, sometimes called the Black Pearl King Oyster, combines the meaty texture of King Oyster with the resilience and deep-coloured caps of specialty strains.
Humidity: Maintain 85–93% RH during fruiting. Mist 2–3 times daily.
Light: Needs indirect light for proper cap development. Avoid direct sunlight.
Air: Gentle airflow is essential.
Black King Oyster Mushroom Grow Kit – Hearty & Gourmet
The Black King Oyster is a hybrid strain of Pleurotus ostreatus, famous for its thick stems, chewy texture, and umami-rich flavor. With darker caps and a robust form, these mushrooms are ideal for stir-fries, grilling, or even as a meat substitute.
Unlike common Oyster mushrooms, Black King Oysters prefer cooler fruiting conditions (15°C–21°C), making them an excellent choice for indoor setups in mild climates. With the right care, each kit can yield multiple flushes totalling up to 1.3kg of fresh mushrooms.
They are also valued for potential health benefits, including cholesterol-lowering properties and antioxidants that support immune health.
Common Mistakes to Avoid
Temperature: Black King Oysters won’t fruit well in warm conditions. Ensure 15–21°C for best results.
Humidity: Low humidity causes cracked caps and small fruit bodies. Mist frequently.
Air Exchange: Poor airflow leads to long stems and tiny caps. Keep gentle ventilation.
Light: Needs indirect light. Too dark = poor formation, too bright = drying.
💡 Tip: If mushrooms grow with long stems and tiny caps, it’s a sign of excess CO₂. Increase airflow.
What if pins form inside the bag?
Don’t worry. Ignore the internal pins. Gently fold the top of the bag to push out excess air, cut a small X in the side of the bag where you want the mushrooms to grow, and begin misting that spot daily. The internal pins will be naturally aborted as they don’t have space to grow.
All mushrooms produce spores as part of their natural growth cycle. Some people may be sensitive or allergic to spores, so be mindful of where you grow them. Harvesting earlier — as the caps begin to flatten — will help you avoid heavy sporulation.
Instructions
Download your full step-by-step growing instructions from the link above. We recommend saving these before your kit arrives so you are ready to go.
Want to Learn More?
This kit introduces you to Stage 3: Fruiting — the final step in mushroom growing. To explore all three stages (from spores to harvest), check out our Educational Mushroom Growing Kit.
Checkout all our Spray and grow kits.
Checkout out our fine Misting Spray Bottle to produce tiny droplets and keep humidity high. The size of droplets formed can easily be evaporated , this constant evaporation signals mycelium to pin.
Could not fruit the bag, or was it contaminated? Send us a photo or call us, and we will help you resolve the issue.
