Organic Blue Oyster Mushroom Grain spawn
- 🍄 GRAIN SPAWN : Pleurotus ostreatus, a staple variety for mushroom cultivation.
- 🌱 VERSATILITY: Works with a wide range of growing media, such as straw, sawdust, and many others, offering growers great flexibility.
- 💪 A HARDY AND HIGH-YIELDING VARIETY: Pleurotus ostreatus is known for its hardiness and exceptional productivity, ensuring abundant harvests.
- 🍽️ EXCELLENT FLAVOR: Prized for its delicate taste, this mushroom adds a unique touch to your dishes.
- 🌍 LOCALLY GROWN AND ORGANIC: Certified "BE-BIO-01" by Certisys.
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Approx. 2 weeks
(usually in stock). See all our delivery times
Oyster mushroom "Blue Oyster" – Pleurotus ostreatus KB1 (Columbinus)
A highly productive and easy-to-cultivate mycelium, suitable for a variety of substrates (straw, sawdust, logs). The strain produces beautiful caps and can take on bluish hues at low temperatures.
Native to the temperate forests of Europe, the oyster mushroom naturally on dead tree trunks and branches. It is most commonly found in the fall and late winter. Today, it is one of the most widely cultivated mushrooms in the world, prized for its flavor and ease of cultivation.
Characteristics of the strain
- Caps: 5 to 15 cm
- Color: light gray to dark brown (depending on conditions)
- Characteristic: bluish hues at 10–15°C at the start of fruiting
- Texture: more tender than many oyster mushrooms, with thick stems
- Advantage: excellent productivity and good shelf life
❄️ Storage: Store in the refrigerator (1–4°C) and use within one month of receipt.
👉 See also: How to use our mycelium
Our Commitment to Quality
- Mycelia produced under laboratory conditions (varietal purity)
- 100% organic production
- BE-BIO-01 Certification (CERTISYS)
🌱 Growing conditions
oyster mushroom be grown year-round. Ideal temperature: 12–20°C. Maintain high humidity from the start of cultivation until primordia appear.
Mycosphere Tip: To trigger a good fruiting, start with a cooler phase at 10–15°C and 95–100% humidity until primordia form, then maintain humidity at around 85–95% during growth.
harvest Pick the clusters by hand, gently twisting them, before the edges of the caps turn brown and curl up. Remove any debris and maintain humidity until the next flush.
🛠️ Recommended growing media
For indoor cultivation: pasteurized straw, pasteurized sawdust, or other lignocellulosic materials.
For a simple and consistent result, we recommend:
- Organic straw pellets (add 1 teaspoon of lime and 2 liters of cold water per kilogram of pellets)
- Sawdust-based substrate for wood-eating species
For outdoor cultivation: logs or mulch. For cultivation on logs:
📊 Growing conditions
Seed rate: 5 to 10% seeds per unit of moist substrate.
| Phase | Temperature | Duration | Humidity | Light | CO₂ | Fresh air |
|---|---|---|---|---|---|---|
| Incubation | 20–24°C | 2–3 weeks | - | - | - | - |
| Formation of primordial cells | 10–15°C | 4–7 days | 95–100% | 600–1,000 lux | 500–800 ppm | 4 to 8 flights per hour |
| fruiting | 10–20°C (ideally 15°C) | 5–10 days | 85–95% | 600–1,000 lux | 500–800 ppm | 4 to 8 flights per hour |
📚 Estimated data from “Growing Gourmet and Medicinal Mushrooms” (P. Stamets). Your results may vary depending on the substrate and growing conditions.
📈 Productivity
On average: 200 to 350 g of fresh mushrooms per 1 kg of moist substrate, over 2 to 3 harvests.
FAQ – oyster mushroom (KB1)
What type of growing medium should I use?
The oyster mushroom is versatile: it can be grown on pasteurized straw, pasteurized sawdust, and other lignocellulosic materials. For simple and consistent results, organic straw pellets work very well.
How much does it produce?
On average, allow 200 to 350 grams of fresh mushrooms per kilogram of moist substrate, over 2 to 3 harvests.
What is the ideal temperature?
For best results: 12–20°C in general, with a cooler initial phase at 10–15°C to trigger fruiting.
Do we need some light?
Yes, soft lighting helps produce beautiful caps: about 600–1,000 lux during the growth and fruiting stages.
What is the vaccination rate?
We recommend using 5 to 10% mycelium (grains) relative to the weight of the moist substrate.
