Everything you need to grow your own King Oyster mushrooms in as little as 4 weeks.

Yes. The bag arrives pre-sterilised and ready to inoculate, so you do not need a pressure cooker, specialist equipment or previous mushroom-growing experience. King Oysters do need cooler fruiting conditions than many other species, so having access to a suitable cool space will give you the best results.

Each kit includes a pre-sterilised all-in-one grow bag, a 10ml King Oyster liquid culture syringe, sterile needle, alcohol swab and clear step-by-step instructions.

You only need a clean area to inoculate the bag, a warm place for colonisation and a spray bottle for the fruiting stage. Everything else is included.

Most growers can expect their first harvest in around 5–7 weeks from inoculation, depending on temperature and growing conditions.

During colonisation, keep your bag somewhere clean and warm, ideally around 20–24°C.

Once the bag is fully colonised, King Oysters need cooler fruiting conditions. Aim for around 12–16°C where possible. A cool utility room, garage, porch or spare room can work well.

Yes, provided you have somewhere suitable for the fruiting stage. King Oysters can be grown indoors, but they need a cooler area than Pink or Golden Oysters once the bag is ready to fruit.

Keep the bag sealed until you are ready to inoculate. Wipe the injection port with the alcohol swab, inject the included liquid culture, then place the bag somewhere warm and clean while the mycelium colonises the substrate.

The bag is ready once the substrate has turned mostly white with healthy King Oyster mycelium. At that point, follow the included instructions to create the fruiting area, move it into cooler conditions and begin misting.

King Oysters need plenty of fresh air during fruiting. Long stems or smaller caps can be a sign that the fruiting area needs better airflow. Follow the instructions closely and make sure the mushrooms are not kept in a sealed or stale space.

Yes. Your first flush is usually the largest, but the block can often produce additional smaller flushes. After harvesting, rehydrate the block and return it to fruiting conditions.

Yields vary depending on temperature, humidity, fresh air and care. Your first harvest is usually the biggest, followed by further smaller flushes from the same block.

King Oysters have a rich savoury flavour and a firm, meaty texture. They are especially good sliced and pan-fried until golden, grilled, roasted or added to stir-fries, pasta, ramen and tacos.

Liquid culture gives you a simple way to start growing without needing to source or prepare grain spawn yourself. The syringe is ready to inject directly through the bag’s self-healing injection port, helping keep the process clean and straightforward.