How to Grow King Trumpet
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King Trumpet
Pleurotus eryngii
vegetableKing Trumpet mushrooms are a gourmet edible fungus prized for their meaty texture and mild, slightly sweet flavor. Also known as King Oyster or Eryngii mushrooms, they are the largest oyster mushroom species and can be grown indoors or outdoors on various substrates. These mushrooms are increasingly popular among home growers and chefs alike.
When should you plant King Trumpet in your zone?
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Example King Trumpet timeline · Pittsburgh, PA (Zone 6b)
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Plant King Trumpet
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest King Trumpet
Around Apr 24≈ 7 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact King Trumpet dates for your own zip code.
Growing Conditions
Soil
Growth Stages
Spawn Run
2-4 weeksWhite mycelium colonizes the substrate, creating a web-like network throughout the growing medium
Maintain temperature at 55-75°F, keep substrate moist, ensure good air circulation, avoid direct light; this phase takes 2-4 weeks
Pinning
3-7 daysTiny mushroom primordia (pins) begin forming on the substrate surface, appearing as small white nodules
Increase humidity to 90-95%, reduce temperature to 55-65°F, provide indirect light 12 hours daily, increase air circulation; this phase lasts 3-7 days
Fruiting Body Development
5-10 daysPins rapidly expand into small mushrooms with distinctive trumpet or vase-shaped caps and white, firm stems
Maintain 80-95% humidity, keep temperature at 55-65°F, ensure excellent air exchange 4-6 times daily, mist 2-3 times daily without wetting caps directly
Maturation
2-5 daysMushroom caps open and flatten slightly; stems thicken and become more opaque; mushrooms reach 4-6 inches tall
Continue misting and air circulation; mushrooms are ready to harvest when caps begin to flatten but before veil breaks; avoid over-misting mature caps
Harvest
Harvest dayFully mature King Trumpet mushrooms with firm, thick stems and opened caps ready for cutting or twisting off
Harvest by twisting at base or cutting with knife; remove all substrate remnants; allow substrate to rest 7-14 days before second flush
Companion Planting
Plan your garden →Avoid planting near:
Common Pests
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Use sterile technique when preparing substrate and inoculating spawn; maintain proper humidity and airflow; discard contaminated batches; ensure equipment is sanitized with 10% bleach solution
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Maintain proper ventilation to prevent attraction; use fine mesh screening on air holes; avoid excess moisture pooling; yellow sticky traps can monitor populations
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Ensure sterile technique and environment; maintain clean growing area; increase airflow and reduce humidity slightly during fruiting
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Avoid waterlogging substrate; reduce humidity if spotting appears; improve air circulation; use sterile water for misting
Uses
Gourmet Cooking & Sautéing
CulinaryKing Trumpets have a firm, meaty texture that holds up well to sautéing, grilling, or roasting. Their mild, slightly sweet flavor and substantial stem make them ideal for upscale dishes and as a vegetarian protein substitute. [source]
Premium Restaurants & Chefs
CulinaryKing Trumpets command premium prices in specialty markets and are featured prominently in Michelin-starred restaurants and upscale cuisine. Their distinctive appearance and texture make them a sought-after ingredient. [source]
Home Growing & Sustainability
HouseholdKing Trumpets are one of the easiest gourmet mushrooms for home cultivation, making them perfect for small-scale indoor farming, urban gardening, and reducing food miles. A single kit can produce multiple pounds of mushrooms. [source]
Nutritional & Immune Support
MedicinalKing Trumpets contain beneficial compounds including ergothioneine and polysaccharides, supporting immune function and providing protein, B vitamins, and minerals. They are lower in calories while being nutrient-dense. [source]
Mushroom Growing Hobby
CraftGrowing King Trumpets is an engaging hobby that teaches mycology basics and provides rewarding fresh harvests. Home growers often expand to creating their own spawn and experimenting with different substrates. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest King Trumpets when caps begin to flatten but before the veil breaks underneath (typically 10-14 days after pinning). Twist or cut at the base of the stem close to the substrate. Handle gently to avoid bruising. Multiple flushes can be obtained from one substrate block by allowing 7-14 days rest between harvests (typically 2-3 flushes total). Best flavor and texture when harvested at medium size (3-5 inches tall) rather than fully mature.
Fun Facts
- 🌱 King Trumpet mushrooms are native to Mediterranean regions and East Asia, where they naturally fruit on thistle plants (Eryngium species), which is why their scientific name is Pleurotus eryngii
- 🌱 Unlike most oyster mushrooms, King Trumpets have a distinctly thick, club-like stem that comprises much of their edible mass, making them the heaviest-yielding oyster mushroom species
- 🌱 A single mushroom spawn kit can produce 2-4 pounds of fresh mushrooms over 2-3 flushes, and spent substrate can be added to garden compost, creating a sustainable growing cycle
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