King Trumpet Oyster Liquid Culture Syringe (10cc)

About King Trumpet Oyster

King Trumpet (Pleurotus eryngii), also known as the King Royal or French Horn mushroom, is the largest species in the oyster family and the one most prized by chefs worldwide. It produces a massive, dense, cylindrical stem that slices and sears like a scallop or piece of abalone — a texture no other cultivated mushroom can match. This is the mushroom that turns up on fine-dining plates under the name "vegan scallop" and the one that consistently sells at the top of the gourmet price tier.

Growing Notes

• Difficulty: Intermediate
• Preferred substrate: Supplemented hardwood sawdust blocks (requires higher nutrient supplementation than other oysters)
• Fruiting temperature: 60–70°F
• Colonization speed: Moderate
• Special considerations: Requires higher supplementation (often with soy hull or wheat bran) for good yields. Restrict fresh air exchange during pin formation to encourage fewer, larger fruits with thick stems; increase FAE gradually as fruits mature.

Culinary Uses

King Trumpet is the most versatile gourmet mushroom in the kitchen. Slice the stems into thick medallions and sear them hard in butter or oil for a scallop-like main course; the dense texture holds a beautiful golden crust. Shred stems for vegan crab cakes or pull them for BBQ. Caps are small and tender — cook them separately to highlight their different texture. Mild, slightly sweet, umami-rich flavor that absorbs marinades beautifully.

Usage Instructions

• Sanitize your work area, tools, and contact surfaces before handling.
• Prepare grain, substrate, agar, or grow kits according to your standard operating procedures.
• Introduce the liquid culture using sterile or near-sterile technique (e.g., in front of a flow hood or still-air box when applicable).
• Maintain species-appropriate incubation and fruiting conditions for temperature, humidity, and fresh air exchange.

Shelf Life & Storage

Store refrigerated at 34–39°F (1–4°C) away from direct sunlight. Under proper storage, typical shelf life is 3–6 months unopened. Always visually inspect for contamination, damage, or off-odors before use.

Quality & COA

Each batch is prepared using standardized procedures and test-inoculated on appropriate media before release. These internal checks act as our in-house Certificate of Analysis (COA) to confirm viability and cleanliness at the time of packaging.

Strain Profile

• Common name: King Trumpet Oyster
• Scientific name: Pleurotus eryngii
• Strain: Isolated culture
• Difficulty: Intermediate
• Preferred substrate: Supplemented hardwood sawdust blocks
• Use case: Premium culinary production, vegan scallop applications, top-tier market pricing

How to Use This Liquid Culture

1. Sterilize the injection port on your grain bag with an alcohol prep pad.
2. Shake the syringe vigorously for 10-15 seconds to disperse the mycelium evenly.
3. Inject 1-2cc of liquid culture through the self-healing injection port of your grain bag. Less is more — 1cc is usually plenty.
4. Seal and incubate the bag at 70-75°F in a clean, dark space.
5. Wait for colonization — white mycelium will begin spreading through the grain within 2-4 weeks.

Temperature & Timeline: Colonization typically takes 2-4 weeks at 70-75°F. Warmer is not better — temperatures above 80°F increase contamination risk.

Signs of Success: You'll see white, fluffy mycelium spreading outward from injection points. The grain will become covered in a uniform white coating when fully colonized.

Next Steps: Once the grain is fully colonized, transfer it to a bulk substrate or introduce fruiting conditions, depending on your setup.

Common Mistake: Injecting too much liquid culture does not speed up colonization — it wastes culture and can introduce excess moisture that encourages contamination. Stick to 1-2cc per bag.

What's in the Box

• 1x 10cc liquid culture syringe
• 1x sterile needle
• 1x alcohol prep pad