Products Description
Black Pearl King Oyster Grain Spawn
This Black Pearl King Oyster grain spawn is a live culture of the prized Pleurotus ostreatus × eryngii hybrid, grown to full colonization on sterilized millet grain. Each 5 lb bag is aggressive and ready to expand.
Black Pearl combines the thick, meaty stem of a King Oyster with the dark, glossy caps and vigor of an oyster. It clusters densely and holds a striking near-black cap when grown with strong fresh-air control.
In the kitchen it is firm and steak-like with a clean, savory flavor — one of the most satisfying gourmet mushrooms to cook.
Why Black Pearl King Oyster Stands Out
This hybrid is fast, forgiving, and heavy-yielding — colonizing quickly and fruiting reliably. Our Black Pearl grain spawn gives you clean, vigorous genetics with real visual drama.
Dark-capped, thick-stemmed, and dependable — Black Pearl is a grower favorite.
Cultivation Notes
Black Pearl colonizes hardwood and straw-based substrates quickly and tolerates a range of conditions. Expand to bulk substrate, then fruit with strong fresh air for the darkest caps and thickest stems. An excellent choice for growers who want yield and forgiveness.
Bold. Meaty. Forgiving.
If you want Black Pearl King Oyster grain spawn for a fast, high-yield grow, this colonized bag is ready to run.
How it ships: a single 5 lb bag of fully colonized Black Pearl King Oyster grain spawn on a sterilized millet base, sealed in a filter-patch grow bag for clean gas exchange — ready to expand into bulk substrate.
New to spawn? Pair it with our liquid cultures or browse the full grain spawn lineup.
Specifications
- Weight: 5 lbs total
- Grain base: Sterilized whole grain
- Colonization: Fully colonized, ready to use
- Storage: Cool and dark; refrigerate to hold
- Best used: Within 30 days of receipt
What’s Included
- 5 lbs of fully colonized grain spawn
Our Brand
Built for Consistency
Liquid Myco focuses on delivering clean, reliable cultures prepared in controlled lab environments. Each product is developed with precision to support consistent performance across microscopy and research applications.
Disclaimer
This product is intended for microscopy and research purposes only. Not intended for cultivation or consumption.







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Great service. Have not been disappointed!
Shain –
Hello. Great customer service and professional
Austin –
So far so good!!
Zoo A. –
Great experience. Received exactly what I ordered in a timely manner. Would definitely recommend and I’ll be back.
Intheflesh89 –
Surfin’ USA. Another great product