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Large Grow Bag with Horizontal Filters

Large Grow Bag with Horizontal Filters

Perfect for cultivating a wide range of mushroom species, especially those that require high gas exchange during fruiting, such as psychedelic, medicinal, oyster mushrooms (Pleurotus), shiitake, and other gourmet varieties. Ideal for clean mushroom picking, substrate fruiting, and maintaining contamination-free cultivation environments.

Availability: In stock

€1.50

Product Description

Details

This premium polypropylene grow bag is specifically designed for serious mycologists who demand reliability, sterility, and excellent performance during the fruiting stage. With its generous size and strategically positioned horizontal filters, this bag provides the ideal environment for growing large-scale mushroom projects.

Key Features:

Extra-Large Capacity: Dimensions of 40 cm wide × 51 cm high make this bag perfectly suited for XL grow boxes and containers up to 2100cc (2.1 liters). Ideal for growers working with larger substrate volumes who need room for substantial mushroom flushes.
Horizontal Filter Design for Enhanced Fruiting: Unlike standard grow bags with small filter patches, this bag features 4 horizontal filters (2 on the front, 2 on the back) that span a significant portion of the bag’s surface. This design provides superior gas exchange, which is essential during the fruiting phase when mushrooms require increased fresh air exchange (FAE) and oxygen to develop properly.
Autoclavable and Sterile-Ready: Made from durable 60-micron polypropylene film that withstands sterilization temperatures up to 123°C (253°F) in an autoclave or pressure cooker. Simply sterilize the bag before use, add your colonized substrate, and seal with paperclips, scotch tape, or clothespins to maintain a contamination-free environment.
Optimal Gas Exchange Technology: The micron filters allow continuous air circulation while blocking microorganisms from entering the bag. This breathable barrier ensures your mycelium receives adequate oxygen during colonization and provides the enhanced FAE necessary for healthy mushroom formation during fruiting.
Professional-Grade Material: Constructed from high-quality polypropylene with proven durability after repeated sterilization and intensive handling. These bags are trusted by both hobbyist cultivators and commercial mushroom operations.

Why Horizontal Filters Matter for Fruiting:

During the fruiting stage, mushrooms require significantly more fresh air exchange than during colonization. The horizontal filter placement on this bag allows mushrooms to stretch toward the oxygen source, promoting healthy fruiting body development. The increased filter surface area facilitates better CO₂ evacuation and O₂ replenishment—critical factors for maximizing yields and producing high-quality mushrooms.

Usage Instructions:

Sterilize the empty bag in an autoclave or pressure cooker at 121-123°C
Once cooled, transfer your fully colonized mushroom substrate or cake into the bag
Seal the bag opening with clips, tape, or clothespins
The filters will automatically regulate gas exchange throughout the growing process

Specifications:

Dimensions: 40 cm (width) × 51 cm (height)
Capacity: Fits containers up to 2100cc (2.1 liters)
Material: Polypropylene (PP), 60-micron film thickness
Heat Resistance: Up to 123°C (253°F)
Filters: 4 horizontal filters (2 front, 2 back)
Filter Type: Depth filtration for optimal gas exchange
Sterilizable: Yes, autoclavable
Single-use: Recommended for one complete grow cycle

Additional Info

Additional Info

Productcode	gn-gb2
Weight (KG)	0.0200
Contents (ml)	No
Contents	No
Origin	No
Sterile	No

Customer Reviews

Big bags for big flushes. Review by Jorge

Rating

This bags are very big wich is good for traping lots of air inside. The filters do their work but you need to use them all, do not go on rolling the top of the bag too much. Very Nice... (Posted on 4/16/2026)

Not good enough quality Review by Telegram:@Magic_Mushrooms030

Rating

Too thin
Easier to rip
Not so stable wenn standing (when mushrooms grow outwards) (Posted on 3/7/2026)

Super Review by Sherban

Rating

The pictures don't do them justice, those bags are actually huge. (Posted on 8/5/2025)

Sehr Gut Review by jX

Rating

Ich bin sehr zufrieden mit den Beuteln was Haltbarkeit und Ergebnisse angeht (Posted on 8/4/2025)

excellent Review by Bojan

Rating

excellent (Posted on 1/2/2025)

Good Grow bags Review by Sehuti

Rating

Had excelent flushes with XL kits using these Grow bags. No issues,fair price, quality bag. (Posted on 10/25/2024)

doing the job Review by alex

Rating

I prefer to use new bags for the second grow (Posted on 9/20/2024)

best growing bags that i know Review by Alexander

Rating

with these its ok to sometimes forget one day to spray as the Ventilation on its own is already superb. (Posted on 1/28/2024)

Great Review by Christoph

Rating

Great Bag is big enough
and has many micron Filters horizontal way!
Perfect bag! (Posted on 12/21/2023)

great Review by Saulius

Rating

did not have a chance to use them yet, but the quality seems to be great.
thank you (Posted on 2/28/2023)

big and goood Review by H

Rating

works good and its big (Posted on 2/23/2023)

Good product Review by Kaleï

Rating

I received the bags very fast, the bags are indeed big, with nice air exchange filters running all around the perimeter of the bag. I tried them in the pressure cooker, it resisted very well. I can recommend it. (Posted on 8/25/2022)

Solid Review by Kevin

Rating

Big, great air exchange, pretty resilient and worked very well for me, you can fruit premade or homemade grow kits in here no problem! (Posted on 3/17/2020)

quality and cheap Review by Sam