A dense cluster of Sporeless Oyster mushrooms with white fan-shaped caps on a dark slate board, beside a clear plastic bag of grain spawn colonized with white mycelium, with a wooden tag reading "AggieTropicals, SPORELESS OYSTER - Premium Spawn Genetics", on a white background.

Sporeless Oyster Mushroom Grain Spawn Bag

G1
200.00 SR
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A dense cluster of Sporeless Oyster mushrooms with white fan-shaped caps on a dark slate board, beside a clear plastic bag of grain spawn colonized with white mycelium, with a wooden tag reading "AggieTropicals, SPORELESS OYSTER - Premium Spawn Genetics", on a white background.
  • A dense cluster of Sporeless Oyster mushrooms with white fan-shaped caps on a dark slate board, beside a clear plastic bag of grain spawn colonized with white mycelium, with a wooden tag reading "AggieTropicals, SPORELESS OYSTER - Premium Spawn Genetics", on a white background.
  • Grain spawn bags in our pressure sterilizer with the lid open
  • Our grain spawn preparation room, with a digital scale on a stainless steel counter and wire shelves stocked with bags of grain.
  • A dense cluster of Sporeless Oyster mushrooms with white fan-shaped caps on a dark slate board, beside a clear plastic bag of grain spawn colonized with white mycelium, with a wooden tag reading "AggieTropicals, SPORELESS OYSTER - Premium Spawn Genetics", on a white background.
  • Grain spawn bags in our pressure sterilizer with the lid open
  • Our grain spawn preparation room, with a digital scale on a stainless steel counter and wire shelves stocked with bags of grain.
Sporeless Oyster Mushroom Grain Spawn Bag

Sporeless Oyster Mushroom Grain Spawn Bag

200.00 SR
Generation
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Maitake Mushroom Grain Spawn Bag A dense cluster of King Blue Oyster mushrooms with blue-grey fan-shaped caps on a dark slate board, beside a clear plastic bag of grain spawn colonized with white mycelium, with a wooden tag reading "AggieTropicals, KING BLUE OYSTER - Premium Spawn Genetics", on a white background. Blue Oyster Mushroom Grain Spawn Bag A dense cluster of Pink Oyster mushrooms with vivid pink fan-shaped caps on a dark slate board, beside a clear plastic bag of grain spawn colonized with white mycelium, with a wooden tag reading "AggieTropicals, PINK OYSTER - Premium Spawn Genetics", on a white background. Pink Oyster Mushroom Grain Spawn Bag A cluster of Golden Oyster mushrooms with bright yellow fan-shaped caps on a dark slate board, beside a clear plastic bag of grain spawn colonized with white mycelium, with a wooden tag reading "AggieTropicals, GOLDEN OYSTER - Premium Spawn Genetics", on a white background. Golden Oyster Mushroom Grain Spawn Bag A dense cluster of Princess Pearl mushrooms with creamy white ruffled caps on a dark slate board, beside a clear plastic bag of grain spawn colonized with white mycelium, with a wooden tag reading "AggieTropicals, PRINCESS PEARL - Premium Spawn Genetics", on a white background. Princess Pearl Mushroom Grain Spawn Bag A dense cluster of Sporeless Oyster mushrooms with white fan-shaped caps on a dark slate board, beside a clear plastic bag of grain spawn colonized with white mycelium, with a wooden tag reading "AggieTropicals, SPORELESS OYSTER - Premium Spawn Genetics", on a white background. Sporeless Oyster Mushroom Grain Spawn Bag A cluster of Shiitake mushrooms with brown caps and cream-colored gills on thick stems on a dark slate board, beside a clear plastic bag of grain spawn colonized with white mycelium, with a wooden tag reading "AggieTropicals, SHIITAKE - Premium Spawn Genetics", on a white background. Shiitake Mushroom Grain Spawn Bag A dense cluster of Chestnut mushrooms with small golden-brown caps on a dark slate board, beside a clear plastic bag of grain spawn colonized with white mycelium, with a wooden tag reading "AggieTropicals, CHESTNUT - Premium Spawn Genetics", on a white background. Chestnut Mushroom Grain Spawn Bag A Reishi mushroom with a glossy reddish-brown lacquered shelf-shaped cap on a dark slate board, beside a clear plastic bag of grain spawn colonized with white mycelium, with a wooden tag reading "AggieTropicals, REISHI - Premium Spawn Genetics", on a white background. Reishi Mushroom Grain Spawn Bag A Turkey Tail mushroom formed of thin fan-shaped caps with multicolored bands on a dark slate board, beside a clear plastic bag of grain spawn colonized with white mycelium, with a wooden tag reading "AggieTropicals, TURKEY TAIL - Premium Spawn Genetics", on a white background. Turkey Tail Mushroom Grain Spawn Bag A cluster of King Stropharia mushrooms with reddish-brown caps and a ring on the stem on a dark slate board, beside a clear plastic bag of grain spawn colonized with white mycelium, with a wooden tag reading "AggieTropicals, KING STRAPHARIA - Premium Spawn Genetics", on a white background. King Stropharia Mushroom Grain Spawn Bag A cluster of Enoki mushrooms with long thin stems and small tan caps on a dark slate board, beside a clear plastic bag of grain spawn colonized with white mycelium, with a wooden tag reading "AggieTropicals, ENOKI - Premium Spawn Genetics", on a white background. Enoki Mushroom Grain Spawn Bag

Ships fresh to order

Satisfaction guaranteed

48-hour damage protection

Start your mushroom cultivation with our premium Sporeless Oyster Grain Spawn, available in approximately 1.5 kg units. Sporeless Oyster (Pleurotus ostreatus, sporeless cultivar) is produced as second-generation (G2) grain spawn from carefully selected commercial fruiting genetics chosen for vigorous mycelial growth, rapid colonization, dense cluster formation, excellent biological efficiency, and consistent yields. Each bag contains fully colonized premium corn grain, providing a vigorous inoculum ready for expansion onto pasteurized or sterilized bulk substrates.

Every grain spawn bag is prepared under strict sterile laboratory conditions and inspected before shipment to ensure vigorous, contamination-free colonization. Sporeless Oyster produces the same tender texture and mild, savory flavor prized in classic oyster mushrooms, but with a key advantage: this cultivar releases virtually no spores during fruiting, resulting in a cleaner grow room, easier harvesting, and reduced exposure to airborne spores, a known irritant for growers who spend extended time around fruiting mushrooms. Modern commercial genetics have resolved the lower yields seen in early sporeless strains, making this a reliable, productive choice for both home growers and small commercial setups. Grain spawn is ideal for inoculating a wide variety of hardwood-based bulk substrates for reliable mushroom production.

Freshly Prepared:

To ensure maximum viability and vigor, every grain spawn bag is prepared fresh to order. Please allow approximately 3–4 weeks for G2 or 4–6 weeks for made-to-order G1 for grain preparation, sterilization, inoculation, complete colonization, quality inspection, and packaging before shipment.

We only offer G2 for strains we are actively growing, so you never wait on a strain we don't have ready. If G2 shows as sold out, you can still order G1, prepared fresh for you from our liquid culture. Prefer to grow G1 yourself? Our Grain Spawn Kit lets you inoculate the bags in your own space. Running a farm and need G2 every week? Contact us to arrange regular weekly deliveries. The first shipment takes about 4–6 weeks to prepare.

Product Details:

  • Approximately 1.5 kg fully colonized premium corn grain spawn
  • Available as G2 from current production, or as made-to-order G1
  • Carefully selected commercial fruiting genetics
  • Virtually spore-free fruiting for a cleaner, lower-irritation growing experience
  • Suited to straw or hardwood-based substrates
  • Prepared under sterile laboratory conditions
  • Packaged in a heavy-duty Type T Unicorn Bag with a 0.2-micron filter patch
  • Ready to inoculate pasteurized or sterilized bulk substrates
  • Intended for gourmet mushroom cultivation

Storage:

For best results, use the grain spawn as soon as possible after arrival. If storage is necessary, keep refrigerated at 2–8°C (35–46°F) and protected from direct light. Do not freeze. Fresh grain spawn provides the most vigorous colonization.

Quality Guarantee:

Every grain spawn bag is visually inspected before shipment to verify vigorous colonization and the absence of visible contamination. If your grain spawn is confirmed to be contaminated upon arrival, contact us promptly with clear photographs within 24 hours of delivery. We will review the claim and, if confirmed, provide a replacement at no additional charge.

Cultivation Experience & Support:

This product is intended for experienced growers familiar with substrate preparation, inoculation, incubation, and fruiting. Purchase includes the grain spawn only and does not include personalized cultivation guidance or troubleshooting. Support is available for order-related concerns and issues covered by our Quality Guarantee.

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