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Midwest Grow Kits

Blue Myco Large Spawn Bags 3T 0.2 Micron Filter 8" X 5" X 19" Extra Thick (800-Pack Case)

Blue Myco Large Spawn Bags 3T 0.2 Micron Filter 8" X 5" X 19" Extra Thick (800-Pack Case)

Regular price $379.99 USD
Regular price Sale price $379.99 USD
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Blue Myco Large Spawn Bags – 800-Pack Case (3T | 0.2µm Spawn Filter | Extra Thick)

The benchmark in durability, consistency, and seal performance.

Upgrade your production with the Blue Myco Large Spawn Bag, trusted by commercial cultivators across North America. These gusseted bags measure 8" x 5" x 19" and are built from ultra-durable 80µm (3.0 mil) polypropylene—15% thicker than leading competitors. Designed for maximum reliability in large-scale operations, they offer excellent flexibility and unmatched seal strength, even after sterilization.

Each bag features a 0.2 micron filter patch (1.5" x 1.5") for optimal gas exchange and a reinforced bottom seal that easily withstands pressure and handling during filling, sterilizing, and incubation. Whether you’re growing in bags daily or expanding your bulk capacity, Blue Myco bags deliver superior performance batch after batch.

Features:

  •     800 spawn bags per case
  •     Gusseted size: 8” x 5” x 19”
  •     Extra thick 80µm (3.0 mil) polypropylene
  •     0.2µm filter patch (1.5” x 1.5”)
  •     Type T filter for optimal breathability
  •     Withstands aggressive sealing and sterilization
  •     Flexible and durable across all temperatures

Why Blue Myco?
Used by the largest spawn producers in Canada and tested daily in our facility for over 2 years, these are the spawn bags we stand by.

Quantity
  • All-in-one, ready to grow
  • Produces multiple flushes
  • High-quality, USA-made
  • Great for home or classroom use
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Free In-Store Pickup Vancouver, WA (Ready in 24h)
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Blue Oyster Mushroom Harvest
★★★★★
“Bountiful First Flush!”
“Picked up two spray-and-grow oyster kits directly at the Fourth Plain showroom. The staff gave great humidity advice, and within 9 days I harvested over 2 lbs of fresh clusters! Exceptional local resource.”
Lion's Mane Harvest
★★★★★
“Dr. Myc Additives Are Game-Changers”
“I was battling contamination in my Lion's Mane tubs until using Dr. Myc TrichEVICT from Fern Prairie. Mixed it during spawning with their sterile bulk substrate—zero green mold and massive secondary flushes.”
Sterile Flow Hood & Monotub
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“Midwest Monotub & Grain Perfection”
“Top-shelf equipment from Midwest Grow Kits delivered quickly with clear instructions. The 5-grain spawn colonized vigorously without any stall. Having local in-store pickup for replacement filters is a huge plus.”