Satrise Grow Bags Large - 0.5 Micron (8" x 5" x 18")

Large Mushroom Grow Bags Canada - 0.5 Micron Filter Patch (8" x 5" x 18")

The large format grow bag is the workhorse of commercial mushroom production. Holding 5-6 lbs of hydrated substrate, these Satrise 0.5 micron filter patch bags are comparable to the Unicorn 14A, the most widely used commercial mushroom cultivation bag in North America. Larger substrate blocks produce significantly bigger harvests, maintain humidity better during fruiting, and support more flushes before exhaustion. For Canadian growers, these bags ship directly from Ontario with no import fees or delays.

Specifications

• Dimensions: 8" x 5" x 18" (20 x 13 x 46 cm)
• Material: 0.08 mm (3 mil) polypropylene
• Filter: 0.5 micron filter patch
• Capacity: approximately 5-6 lbs of substrate
• Heat tolerance: autoclavable at 15 PSI / 121 C (250 F)
• Design: gusseted sides, strong bottom seal
• Comparable to: Unicorn 14A bags

What Makes These Different

The 0.5 micron filter patch blocks airborne contaminants including mold spores and bacteria while providing robust gas exchange for healthy colonization. The thick 3 mil polypropylene withstands extended sterilization cycles at 15 PSI without warping or weakening. At this capacity, the strong bottom seal is critical since it supports 5-6 lbs of wet substrate through mixing, handling, and weeks of incubation.

The gusseted design creates stable, rectangular blocks that stack efficiently in your fruiting room. When empty, these autoclavable grow bags fold completely flat for compact storage. During sterilization, the gusset fold creates a barrier against contamination during the cool-down period. These are the same specifications commercial farms rely on for daily production runs.

Ideal Uses

• Supplemented sawdust fruiting blocks: the standard commercial application for oyster, lion's mane, shiitake, maitake, and chestnut mushrooms using hardwood sawdust with wheat bran or soy hulls
• Masters mix production: the popular 50/50 hardwood sawdust and soy hull blend performs excellently at this volume
• Commercial oyster production: most oyster farms use this bag size as their standard, fruiting directly from cuts in the bag sides
• Shiitake block production: larger substrate volumes benefit shiitake, supporting browning cycles and producing more marketable mushrooms
• Grain spawn at scale: serious spawn producers use this size for efficient large-batch grain spawn runs

How to Use

Fill and prepare

Mix your mushroom substrate at 60-65% moisture content. Fill bags with 5-6 lbs, leaving 4-5 inches of headspace. Fold the top down twice between the gussets.

Sterilize

Load bags upright in your autoclave or pressure cooker with the filter patch facing outward. Leave at least 1 inch between bags. Use a rack or trivet to prevent direct contact with the pot bottom. Sterilize at 15 PSI for 2-2.5 hours for these larger blocks.

Cool and inoculate

Let bags cool in the sterilizer for 8-12 hours. The substrate must reach room temperature before opening. Working in clean conditions, add spawn at 10-15% of substrate weight and mix thoroughly. For liquid culture inoculation, inject through the bag or pour directly.

Seal and incubate

Seal with an impulse sealer (14-16 inch recommended), bag clamps, or heavy-duty zip ties. Incubate at species-appropriate temperatures until fully colonized, typically 2-4 weeks.

Why Order From Nature Lion

All mushroom cultivation bags ship from our facility in Brantford, Ontario. No customs, no brokerage fees, no multi-week border delays. Free shipping on all orders, with same-day dispatch on orders placed before 2 PM EST. Nature Lion has served over 50,000 Canadian mushroom growers since 2020.