Black Pearl King Oyster Mushroom Strain (Pleurotus ostreatus Hybrid) - Premium Fresh Mushroom Mycelium Spawn

Black Pearl Oyster Spawn for High-Performance Mushroom Cultivation

The Black Pearl Oyster or Black Pearl King Oyster is a oyster mushroom (Pleurotus ostreatus) hybrid from Japan. It is the result of a cross between a European and an Asian Pleurotus ostreatus.

It grows and looks much like Pleurotus eryngii (King Oyster) in the beginning as it matures it will look more like a Pleurotus ostreatus (Pearl Oyster). Black Pearl Kings are less finicky than Pleurotus eryngii, and are able to grow very well indoors. It grows on the same substrates as pearl or king oysters such as masters mix or hardwood sawdust. It is a fast substrate colonizer that fruits dense, meaty mushrooms.

Lab produced, Belgian made, top quality, fresh, mycelium strains on sterilized rye grain berries in special sealed mushroom bags.

Once the bag is opened, the spawn must be used and applied to the substrate immediately.

You will receive ready colonized rye grain spawn for inoculation on various fruiting substrates, of your choice.

Your spawn is prepared fresh after ordering to maximize on quality. For this reason it may take between 10 to 14 days to produce.

Ideally the product should be used immediately after delivery, but, keep it stored in the fridge at 4° Celsius for a maximum of two months and it will still be viable - Respect the expiry date on the package.

EDIBILITY

The Black Pearl King Oyster mushroom (a hybrid of King Trumpet and Grey/Pearl Oyster) is completely edible, delicious, and versatile, offering a meaty texture, rich nutty/earthy flavor, and serving as a great plant-based meat substitute, but it must be cooked and not eaten raw.

HOW MUCH SPAWN TO BUY

The weight of your mushroom spawn ordered determines its intended use, so:

300g - Used to inoculate a sterilized/pasteurized block of 1.5 Kg

500g - For larger sterilized/pasteurized substrate inoculations of up to 2.5 Kg.

BEST GROWING CONDITIONS FOR BLACK PEARL KING OYSTER

Substrate: Hardwood sawdust, Straw

Colonization Temperature:  18-26C, 65-78F

Fruiting Temperatures:  10-20C, 50-68F

Humidity: 90-95%

GROWING 

For maximum results it is best that this mushroom is grown indoor within a hydroponics grow room/tent, but a clean area or dark corner where there is a decent amount of humidity, air exchange and constant temperatures could also be used.

A humidifier would help to monitor humidity. Do not put in direct sunlight and watch out for gnats.

Powerful Hybrid Genetics for Reliable Results

Black Pearl oyster spawn is a premium Pleurotus ostreatus hybrid developed for growers who want dependable performance and strong fruiting potential. Known for its vigorous mycelium and excellent adaptation to cultivation environments, this strain is valued by both commercial producers and home mushroom growers. Its hybrid genetics help support consistent colonization and a healthy growth cycle, making it a smart choice for anyone seeking quality and stability in mushroom production. With proper care, this spawn can help produce attractive, dense mushrooms with excellent texture and market appeal.

Fast Colonization and Strong Fruiting Ability

This mushroom mycelium spawn is designed to give growers a strong start from the beginning. The Black Pearl oyster spawn colonizes substrate efficiently, helping reduce wait time and encouraging even growth across the growing medium. Its strong fruiting ability makes it suitable for a variety of cultivation setups, including sawdust blocks, straw-based substrates, and other common mushroom-growing materials. Because of its reliable development pattern, growers can better manage their production schedule and improve harvest planning. For those focused on yield and consistency, this strain offers practical advantages in both small-scale and larger operations.

Premium Fresh Spawn for Versatile Cultivation

As a premium fresh mushroom mycelium spawn, this product is ideal for growers who need quality material that supports healthy mushroom development. Fresh spawn is important because it helps maintain strong vitality and better growth performance during inoculation. The Black Pearl oyster spawn is especially useful for cultivation projects that require a hardy strain with good adaptability and a proven production profile. Its versatility makes it a reliable option for mushroom farms, specialty growers, and educational growing environments. When stored and handled correctly, it can help support excellent crop results and a more efficient cultivation process from start to finish.

Ideal Choice for Quality and Market Appeal

Black Pearl oyster mushrooms are appreciated for their attractive appearance, meaty texture, and excellent culinary value. This makes the spawn a practical choice for growers aiming to produce mushrooms that stand out in the market. The strain’s strong growth traits and premium hybrid nature support high-quality harvests that can meet both fresh produce and specialty food demand. Whether you are expanding a commercial mushroom business or starting a new growing project, this spawn offers a dependable foundation. With the right substrate, temperature, humidity, and airflow, growers can achieve productive results and deliver mushrooms with strong visual and commercial appeal.