King Oyster Mushroom Grow Kit – Grow Gourmet Mushrooms at Home!

Grow your own King Oyster mushrooms (Pleurotus eryngii) with this easy-to-use grow kit! Known for their velvety light grey-brown caps and thick, meaty white stems, King Oyster mushrooms grow in decorative clusters and are prized for their rich, umami flavor.

Each mushroom develops a large, sturdy stem (6-10 cm long, 2-6 cm thick) and a broad cap (5-12 cm wide) with delicate, decurrent gills. Their firm texture and slightly spicy taste make them perfect for gourmet cooking. Enjoy them in hearty sauces, alongside meat or game, or as a star ingredient in vegetarian dishes—try them pan-fried with leeks in an autumnal pasta.

Harvest fresh King Oyster mushrooms right from your kitchen and elevate your culinary creations!

How to Grow Your King Oyster Mushroom Growkit

Your king oyster mushroom growkit includes a plastic bag filled with a nutrient-rich sawdust substrate, a plastic container, and a lid. As the mushrooms begin to develop, you may notice small white, bubble-like growths on the surface—these are the early stages of your king oyster mushrooms.

Starting the Cultivation Process

Once you see small bubbles forming at the top of the substrate, remove the plastic bag completely. Soak the substrate block in water for 30 minutes, allowing it to absorb moisture. After soaking, place it back into the container and cover it with the transparent lid. This helps regulate humidity and oxygen levels, creating the perfect environment for mushroom growth.

Tip: Always wash your hands before handling the substrate to avoid contamination.

Store the growkit in a humid, sheltered area with a temperature between 16-19°C to mimic the ideal autumn-like conditions. Spray the substrate twice daily with a misting bottle to keep it moist, but avoid soaking it.

Growth and Development

Within one week, you’ll notice more bubble-like formations appearing—these will soon develop into large, firm king oyster mushrooms. Continue misting the growkit daily to maintain humidity during this stage.

Harvesting Your King Oyster Mushrooms

Your king oyster mushrooms are ready to harvest when the smallest caps reach 2-4 cm in diameter and have just begun to curl downward. To harvest, gently grasp a cluster by the cap and twist them off carefully.

Multiple Harvests

The first crop is typically the largest, but your king oyster mushroom growkit can continue producing mushrooms for multiple flushes. Keep misting the substrate after harvesting, and within two weeks, a second crop will emerge. However, yields may decrease with each harvest as nutrients deplete.

Enjoy growing and harvesting your own delicious king oyster mushrooms at home! 🍄