Organic Oyster Mushroom Grain spawn
- 🍄 MYCELIUM ON OYSTER MUSHROOM SPORES: Pleurotus pulmonarius, a fast-growing, vigorous, and easy-to-cultivate variety.
- ☀️ IDEAL FOR MILD TO WARM TEMPERATURES: Also known as the summer oyster mushroom, it tolerates heat better than many gray oyster mushrooms.
- 💪 RAPID COLONIZATION: Aggressive mycelium that is reliable and generally resistant to contamination.
- 🍽️ DELICATE FLAVOR: Tender yet firm flesh, perfect for pan-frying, grilling, or prepared dishes.
- 🌍 LOCALLY GROWN AND ORGANIC: Certified BE-BIO-01 by Certisys.
To grow your oyster mushrooms:
Lung oyster mushroom / Italian oyster mushroom – Pleurotus pulmonarius
The oyster mushroom, also known as the Italian oyster mushroom or summer oyster mushroom, is an easy-to-grow variety suitable for both beginners and more experienced growers.
Its mycelium is vigorous, colonizes the substrate quickly, and is particularly well-suited for cultivation in milder or warmer temperatures.
This variety is often called the summer oyster mushroom because it tolerates high temperatures better than traditional gray oyster mushrooms. However, it can also be grown in winter, when the resulting mushrooms often keep longer and have a firmer texture.
The caps are generally between 3 and 7 cm in diameter, with colors ranging from light beige to light brown depending on growing conditions. The stems are often shorter than those of many Pleurotus ostreatus, and the mushrooms may grow in more open clusters.
🔬 This is mycelium on grains, intended for making your own growing media.
This variety is particularly well-suited for warmer periods, but it still requires good humidity and adequate ventilation during fruiting.
❄️ Storing the mycelium: Store in the refrigerator, ideally between 1 and 4°C.
For best results, use it within one month of receipt.
👉 See also: How to use our mycelium
Our Commitment to Quality
We produce our mycelium under laboratory conditions to ensure varietal purity and optimal quality.
Our mycelia are organically produced and certified BE-BIO-01 by Certisys under the Belgian Organic Agriculture program.
🌱 Growing conditions
The oyster mushroom is particularly well-suited to mild to warm conditions. It can be grown year-round, but it becomes a particularly good option when temperatures are too high for certain varieties of gray oyster mushrooms.
The fruiting quickly. It is recommended to harvest them while they are still young, before the caps open too much, to ensure better texture and longer shelf life.
Tip from La Mycosphère: During hot weather, pay special attention to humidity levels. Oyster mushrooms grow quickly, but their caps can dry out fast if the air is too dry or too drafty.
🛠️ Recommended growing media
For indoor growing
Use pasteurized straw, pasteurized wood shavings, or other lignocellulosic materials.
For a simple and consistent result, we recommend:
- Organic straw pellets: Add about 1 teaspoon of lime and 2 liters of cold water per kilogram of pellets.
- Sawdust-based substrate: suitable for wood-eating species and very convenient for regular cultivation.
📊 Growing conditions
Inoculation: 5 to 10% grain mycelium relative to the weight of the moist substrate.
| Phase | Temperature | Duration | Humidity | Light | CO₂ | Fresh air |
|---|---|---|---|---|---|---|
| Incubation | 20–29°C | 10–20 days, often faster on straw than on sawdust | - | - | - | - |
| Formation of primordial cells | 10–20°C | 3–5 days | 95–100% | 1,000–2,000 lux | 500–800 ppm | 5 to 10 cubic feet per hour |
| fruiting | 10–30°C | 3–8 days, depending on the temperature | 85–95% | 1,000–2,000 lux | 500–800 ppm | 5 to 10 cubic feet per hour |
📚 Estimated data from *Growing Gourmet and Medicinal Mushrooms* by Paul Stamets. Results may vary depending on the strain, substrate, humidity, ventilation, and growing conditions.
📈 Productivity
On average, allow 150 to 250 grams of fresh mushrooms per kilogram of moist substrate, over 2 to 3 harvests, depending on the substrate and growing conditions.
FAQ – Oyster Mushroom
Why is it called the summer oyster mushroom?
Because Pleurotus pulmonarius tolerates high temperatures better than many other oyster mushroom species, it is particularly well-suited for spring, summer, or off-season cultivation.
What type of growing medium should I use?
Pasteurized straw works very well, as does pasteurized sawdust. Colonization often occurs more quickly on straw.
When should you harvest?
It’s best to pick mushrooms when they’re young, before the caps open up too much. They’ll have a better texture and keep longer.
Can it be grown in winter?
Yes. It can be grown year-round. In cooler conditions, growth may be slower, but the flavor and shelf life are often better.
What inoculation rate should be used?
We recommend using 5 to 10% grain mycelium relative to the weight of the moist substrate.
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