$22.99
Grow premium Grospore Black Pearl King Oyster mushrooms with our lab-tested 10ml (10cc) liquid culture syringe. Also sold as Black Pearl Oyster, Black King Oyster or simply Black King, this hybrid is known for thick meaty stems, dark gray caps and vigorous growth. Live mycelium, not spores.
Cultivate Black Pearl King Oyster mushrooms with our premium Grospore 10ml (10cc) liquid culture syringe. This distinctive hybrid is known for combining characteristics of King Oyster and Pearl Oyster mushrooms, producing thick, substantial stems with broad, dark gray to charcoal-colored caps.
Sold across the market as Black Pearl King Oyster, Black Pearl Oyster, Black King Oyster or simply Black King, this cross of Pleurotus ostreatus and Pleurotus eryngii is prized by growers and chefs for its meaty texture, rich savory flavor, attractive appearance, and excellent culinary versatility.
Our Grospore Black Pearl King Oyster Liquid Culture Syringe contains vigorous living mycelium, lab-tested and prepared in our ISO-certified cleanroom to support healthy colonization and dependable cultivation performance.
Each 10ml (10cc) syringe offers:
Refrigerate your liquid culture syringe on arrival. Stored at 35–45°F (2–7°C), upright and out of direct light, it stays viable for 4–6 months. Orders ship fast from Oregon in discreet packaging, with tracking on every order and a 30-day return policy on unused items.
Black Pearl King Oyster offers an impressive combination of appearance, texture, flavor, and cultivation performance. Its thick stems and dark caps create a premium presentation, while its dense texture makes it especially popular for grilling and other hearty recipes.
Whether you’re a home grower, culinary enthusiast, or experienced mushroom cultivator, Black Pearl King Oyster is an excellent addition to a gourmet mushroom collection.
Experience one of the most distinctive gourmet Oyster varieties with our Grospore Black Pearl King Oyster Mushroom Liquid Culture Syringe. Each 10ml (10cc) syringe contains lab-tested, vigorous living mycelium ready for your next cultivation project.
Gourmet and edible cultivation species only. GROmagic does not sell psilocybin or Psilocybe cultures. For cultivation use — not a food, drug or dietary supplement.
floyd_harker –
Absolutely ripped through grain and fruited thick stems fast. Super happy.
Anonymous –
Honestly bought this after a messy first attempt with another oyster culture from a different seller. Big difference here. The syringe looked clean, the mycelium was easy to break up, and my grain jars took off faster than I expected. I liked that the instructions on storage and how much to use were straightforward, which helped since I tend to overthink inoculation. Fruited into chunky stems with darker caps than my regular oysters. Would order again.
Damon –
This is a reorder for me, and that usually means a culture did its job the first time without creating extra troubleshooting. My first syringe colonized grain evenly and produced the kind of dense, meaty black pearl fruits I was aiming for, so ordering another one was a straightforward decision. I like keeping one of these in rotation because it performs consistently on my usual hardwood-based setup and gives me a reliable option when I want something heartier than standard oysters. The second syringe looked just as clean as the first and started moving on grain within the same general timeframe. For reorders, consistency matters more to me than novelty, and this one has been consistent enough that I do not need to shop around every time I want to run this variety again.
Anonymous –
Sent it to my nephew. It arrived quickly, tracked well, and packed securely.
Nia K. –
Picked this up for my partner, who grows gourmet varieties as a hobby. I had a quick question before ordering and support answered clearly without talking over me. That made gift-buying a lot less stressful, and he was pleased with it.
J.C. –
Last time I tried a black oyster culture from another shop, it dragged on forever and one jar turned sketchy fast. This one was way more dialed in. I put it to grain and saw cleaner, quicker growth without babysitting every little thing. The stems also came out thicker than my previous run, which was exactly what I was hoping for. Big upgrade from my last attempt, no question.
Eszter F. –
Order moved quickly and tracking updated without gaps. It arrived within the window, packed neatly, and the syringe was still cool when I opened it. For something time sensitive like liquid culture, that matters more than fancy extras.
Dylan P. –
What stood out to me was how well this handled transfer work. I put a little to agar first to check it, then expanded to grain, and both steps stayed clean. The culture spread evenly and did not have those stubborn clumps that make fine work annoying. End result was a solid flush with thick stems that cooked up beautifully in a hot pan. Good pick if you like testing on agar before committing a whole batch.
Warren Tilley –
Instructions were so clear, even I only had to reread them twice.
Eldar Bekzhan –
Cleaner than my last black oyster culture, and it moved through grain without the stall-outs.
Binta K. –
I half expected my first run with this culture to turn into an accidental science fair project, but it behaved much better than I did. I used it on sterilized grain, saw visible growth sooner than expected, and the jars moved along evenly without any sketchy patches or weird smells. That alone lowered my blood pressure quite a bit.
What I liked most was the actual outcome once transferred to fruiting substrate. The mushrooms came in with thick stems and darker caps just like I hoped, and the texture after cooking was genuinely meaty instead of floppy. Yield was solid for my setup, and the clusters looked good enough that I took too many photos before harvesting.
So yes, the result was excellent. The mushrooms were hearty, tasty, and dramatically more productive than my usual habit of doubting everything.
Randy, NC –
Picked this up for my brother after he got interested in growing gourmet mushrooms at home. I can’t speak to the process firsthand, but he kept me updated and was really impressed with how quickly this culture took on grain. He said the growth looked clean, the jars colonized evenly, and the Black Pearl fruits had thick stems and great texture in the pan. Good gift, apparently.
Randy, NC –
Picked this up for my brother after he got interested in growing gourmet mushrooms at home. I can’t speak to the process firsthand, but he kept me updated and was really impressed with how quickly this culture took on grain. He said the growth looked clean, the jars colonized evenly, and the Black Pearl fruits had thick stems and great texture in the pan. Good gift, apparently.
Khadija El Amrani –
Ordering this again because the first syringe stayed clean, active, and worth repeating.
Anonymous –
Had one basic question about using liquid culture on grain and support answered it without the usual vague nonsense. Quick, direct, usable reply. That should be normal, but apparently it deserves praise now. Product worked fine too.