King Oyster / King Trumpet (Pleurotus eryngii) Liquid Culture Syringe – 10ml / 10cc
Grow Thick, Meaty Gourmet King Oyster Mushrooms
Cultivate Grospore King Oyster mushrooms with our premium 10ml (10cc) liquid culture syringe. King Oyster mushrooms are prized for their thick, substantial stems, compact caps, firm texture, and rich savory flavor.
Also known as King Trumpet, King Trumpet Oyster, Trumpet Royale, French Horn mushroom, eringi in Japan, saesongi in Korea and cardoncello in Italy, Pleurotus eryngii has become a favorite among chefs and mushroom enthusiasts because of its impressive size, dense texture, and exceptional versatility in the kitchen.
Why Choose King Oyster / King Trumpet Mushrooms?
- Thick, Meaty Stems – Produces the substantial, dense stems that make King Oyster and King Trumpet mushrooms stand out from other Oyster varieties.
- Rich Savory Flavor – Offers a mild, earthy, umami-forward flavor that readily absorbs seasonings and sauces.
- Firm, Satisfying Texture – Maintains its structure exceptionally well during cooking, making it ideal for hearty recipes.
- Exceptional Culinary Versatility – Excellent for grilling, roasting, sautéing, stir-fries, pasta, soups, and plant-based dishes.
- Distinctive Appearance – Characterized by thick creamy-white stems topped with compact tan-to-brown caps.
Lab-Tested Liquid Culture for Reliable Growth
Our Grospore King Oyster / King Trumpet 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:
- Live Mycelium, Not Spores – This is a liquid culture (LC) syringe, not a spore syringe. There is no germination step, so colonization begins as soon as you inoculate.
- Lab-Tested & ISO Cleanroom Prepared – Every batch is lab-tested for purity and prepared in an ISO-certified cleanroom, so what reaches you is clean, contaminant-free and viable.
- Faster Colonization – Active mycelium helps promote efficient colonization compared with starting from spores.
- Convenient 10ml (10cc) Syringe – 10cc and 10ml are the same volume. Easy to use with appropriately prepared sterile growing media, grain spawn or agar.
- Consistent Genetics – Cloned, isolated Pleurotus eryngii mycelium for predictable stem thickness and cluster form, grow after grow.
How to Grow King Oyster / King Trumpet Mushrooms
- Prepare the Substrate – Hardwood sawdust-based substrates supplemented with suitable nutrients are commonly used for King Oyster cultivation. The same syringe can also be used to inoculate sterilized grain spawn, grain jars or bags, or an agar plate.
- Inoculate – Inject 2–3cc (2–3ml) per grain jar or bag through a self-healing injection port, using sterile technique in a still air box or in front of a laminar flow hood.
- Colonize – Allow the mycelium to fully colonize the substrate under suitable incubation conditions.
- Initiate Fruiting – Once fully colonized, provide appropriate humidity, fresh-air exchange, indirect light, and suitable fruiting temperatures.
- Harvest & Enjoy – Harvest when the stems are thick and firm and the caps have developed to the desired size.
Storage, Shelf Life & Shipping
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.
A Premium Choice for Gourmet Mushroom Growers
Grospore King Oyster mushrooms offer a distinctive combination of impressive size, dense texture, attractive appearance, and culinary versatility. Their thick stems can be sliced, shredded, scored, grilled, roasted, or sautéed, making them one of the most versatile gourmet mushrooms available.
Whether you’re expanding your gourmet mushroom collection or looking for a substantial culinary variety, Grospore King Oyster provides a rewarding cultivation experience.
Start Growing Grospore King Oyster Mushrooms Today
Add a premium gourmet mushroom to your cultivation lineup with our Grospore King Oyster Mushroom Liquid Culture Syringe. Each 10ml (10cc) syringe contains lab-tested, vigorous living mycelium ready for your next mushroom growing 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.
Wayne –
Been keeping a few gourmet cultures in rotation for years, and this is one I actually reorder without much debate. My last syringe stayed clean and moved fast, so when I wanted king oysters again, I just bought the same one.
Wayne –
Been keeping a few gourmet cultures in rotation for years, and this is one I actually reorder without much debate. My last syringe stayed clean and moved fast, so when I wanted king oysters again, I just bought the same one.
Robin E. –
Picked this up for my brother, and the packaging made a good first impression. The syringe was capped securely, wrapped neatly, and arrived looking clean and protected. For a gift, that presentation mattered more to me than people might think.
Robin E. –
Picked this up for my brother, and the packaging made a good first impression. The syringe was capped securely, wrapped neatly, and arrived looking clean and protected. For a gift, that presentation mattered more to me than people might think.
Warren Cates –
Bought this for my brother, and he said the instructions were clear enough to follow confidently.
Tavish K. –
Solid culture, clean start, no weirdness. Already back for another one.
Sanjana Rao –
Picked this up for my cousin who experiments with gourmet grows. It got to her faster than expected, tracking was clear, and the cold pack was still cool when she opened it. Good first impression.
Brent, ME –
Sent this to my brother and it arrived way faster than I expected.
C.K. –
Compared to my last attempt, this colonized faster and stayed clean.
Noura El Masri –
Before inoculating, I contacted support to ask two very specific things: whether this was live culture rather than spores, and how long it would realistically stay viable in the refrigerator if I could not use it immediately. The reply was clear, direct, and actually addressed what I asked instead of sending a generic template. They confirmed storage range, suggested keeping it upright, and explained a reasonable use window without overselling it.
That mattered to me more than fast hype. I want accurate answers when I am planning grain work around my schedule. The syringe arrived labeled well, and the guidance I got beforehand matched what was included. I used that information to delay inoculation by a few weeks with more confidence. Good product, but the main reason I would order again is that support was specific and useful.
mush_habit –
Fast ship, cold pack was still cool, and the culture looked active. I mostly bought this for weeknight cooking because king oysters hold up better in the pan than other gourmet varieties I’ve tried. It colonized a supplemented sawdust block evenly, and the first flush gave me chunky stems that sliced nicely for searing. Good value considering one syringe covered more than I expected.