Black King Oyster Mushroom – Ready-to-Fruit Block (Pleurotus ostreatus)

Product detailed description

Grow the royal centerpiece of gourmet mushrooms right at home. This 4 kg block of Pleurotus ostreatus (Black King Oyster) is fully colonized and ready to fruit.

Known for its thick, juicy stems, mild umami flavor, and impressive shelf life, Black King Oyster is a favorite among chefs, vegans, and high-end restaurants.

✅ Dense, meaty texture – excellent meat substitute
✅ 100% natural Slovak-grown substrate
✅ Beginner-friendly, high-yielding

How to Fruit:

1. Cut a large “X” on side

2. Mist 2–3× daily or use a humid chamber.

3. Maintain ideal conditions and harvest in 5–10 days.

Fruiting Conditions:

• Temperature: 16–22°C (60–72°F)

• Humidity: 85–90% RH

• CO₂: <800 ppm (CO₂-sensitive – poor air causes long stems)

• Light: 800–1500 lux for 12 hrs/day

• Air exchange: 5–6x/day (Black King needs a lot of fresh air!)

Tips for Best Results:

• For thick stems: ensure excellent air exchange and low CO₂.

• Don't over-mist—this variety prefers less direct wetting.

• Harvest when caps are still roll under and tight for best texture and shelf life.

• Make X on side and grows best upright 

• Apply cold shock(drop temperature bellow 15 C) if fruit doesn't appear within one week

What’s Inside:

• 1x Fully colonized fruiting block (~4 kg)

• Packed in breathable filter bag

Expected Yield: 1000–1500g over 1–2 flushes
Storage: Use within 1–2 weeks or refrigerate