---
product_id: 502708114
title: "50 Pack Heavy Duty Mushroom Grow Bags - 6 Mil Polypropylene Substrate Bags, Large Size 8\" X 5\" X 20\" for Cultivation, Spawn, and Sawdust Fruiting Blocks"
brand: "gymgit"
price: "1226 kr"
currency: DKK
in_stock: true
reviews_count: 1
url: https://www.desertcart.dk/products/502708114-50-pack-heavy-duty-mushroom-grow-bags-6-mil-polypropylene
store_origin: DK
region: Denmark
---

# 8" x 5" x 20" Large Size 0.2 Micron Breathable Filter 6 Mil Heavy-Duty Polypropylene 50 Pack Heavy Duty Mushroom Grow Bags - 6 Mil Polypropylene Substrate Bags, Large Size 8" X 5" X 20" for Cultivation, Spawn, and Sawdust Fruiting Blocks

**Brand:** gymgit
**Price:** 1226 kr
**Availability:** ✅ In Stock

## Summary

> 🍄 Grow Like a Pro, Bag the Future Today!

## Quick Answers

- **What is this?** 50 Pack Heavy Duty Mushroom Grow Bags - 6 Mil Polypropylene Substrate Bags, Large Size 8" X 5" X 20" for Cultivation, Spawn, and Sawdust Fruiting Blocks by gymgit
- **How much does it cost?** 1226 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/502708114-50-pack-heavy-duty-mushroom-grow-bags-6-mil-polypropylene)

## Best For

- gymgit enthusiasts

## Why This Product

- Trusted gymgit brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Spacious & Standout:** Generous 8" x 5" x 20" gusseted bags provide a sturdy, upright grow environment holding up to 5-8 lbs substrate.
- • **Breathe Easy, Grow Better:** Integrated 0.2-micron filter ensures optimal gas exchange while blocking contaminants for healthier yields.
- • **Bulk Pack, Bulk Potential:** 50-pack supply means you’re ready to scale your mushroom farm or school project without running out.
- • **Built to Last, Designed to Grow:** Durable 6 Mil polypropylene withstands high temps and rough handling for reliable cultivation.
- • **Versatile Cultivation Powerhouse:** Perfect for oyster, bamboo fungus, Ganoderma, spawn, and sawdust fruiting blocks — hobbyist to pro-grade.

## Overview

This 50-pack of heavy-duty 6 mil polypropylene mushroom grow bags features large 8" x 5" x 20" gusseted design with a breathable 0.2-micron filter, enabling efficient, contaminant-free cultivation of various mushroom species. Durable, sealable, and spacious, these bags support up to 5-8 pounds of substrate, ideal for both professional growers and enthusiasts aiming to maximize yield in minimal space.

## Description

Heavy Duty 6 Mil Polypropylene Mushroom Substrate Bags, Large Size 8" X 5" X 20" for Mushroom Cultivation, Spawn Bags, and Sawdust Fruiting Blocks

## Features

- Sealable and Durable: Mushroom substrate bags are made of polypropylene plastic designed to withstand high temperatures. The plastic is durable and clear enough to make monitoring growth easy. Can be sealed with an impulse sealer, or can just be tied to the seal.
- Reliable and Efficient: 50 Pack of 5 (gusset) x 20" (long) x 8 (wide) Mushroom bags can hold 5-8 pounds. Mushroom grow bags produce a side-gusseted style that gives a sturdy stand-up bag after filling and a strong bottom seal, effectively protecting your mushrooms or other plants.
- Excellent Breathable Filterability: mushroom grow bags with a 0.2-micron filter allow free exchange of gas while preventing the entry of pollutants. Grow like a pro mushroom growers around the globe use these bags to dramatically reduce space needed to grow or spawn mushrooms when compared to trays and tubs.
- Wide Application: Multi-use for inoculation of clone oyster mushrooms, bamboo fungus Ganoderma mushrooms, and more. They can also be applied to spawn bags and sawdust fruiting blocks. Great for school projects, hobbies, and even professional mushroom growers, farmers, and mushroom cultivation.
- What You Get: 50 Pack Farm Mushroom Spawn Bags. Each mushroom substrate bag that encounters problems in use can get a 24-hour response and solution. Five-Star Shopping Experience at Gymgit.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Gymgit |
| Model Number | 50Pcs Mushroom Bags |
| Colour | Clear |
| Product Dimensions | 20.32 x 50.8 x 12.7 cm; 453.59 g |
| Capacity | 3.63 kg |
| Material | Polypropylene (PP) |
| Special Features | Heavy Duty |
| Item Weight | 454 g |

## Product Details

- **Material:** Polypropylene (PP)
- **Colour:** Clear
- **Special feature:** Heavy Duty
- **Style:** Modern
- **Planter form:** Vertical

## Images

![50 Pack Heavy Duty Mushroom Grow Bags - 6 Mil Polypropylene Substrate Bags, Large Size 8" X 5" X 20" for Cultivation, Spawn, and Sawdust Fruiting Blocks - Image 1](https://m.media-amazon.com/images/I/718hcguRouL.jpg)
![50 Pack Heavy Duty Mushroom Grow Bags - 6 Mil Polypropylene Substrate Bags, Large Size 8" X 5" X 20" for Cultivation, Spawn, and Sawdust Fruiting Blocks - Image 2](https://m.media-amazon.com/images/I/71nb3FsYphL.jpg)
![50 Pack Heavy Duty Mushroom Grow Bags - 6 Mil Polypropylene Substrate Bags, Large Size 8" X 5" X 20" for Cultivation, Spawn, and Sawdust Fruiting Blocks - Image 3](https://m.media-amazon.com/images/I/81DJeC3Q9LL.jpg)
![50 Pack Heavy Duty Mushroom Grow Bags - 6 Mil Polypropylene Substrate Bags, Large Size 8" X 5" X 20" for Cultivation, Spawn, and Sawdust Fruiting Blocks - Image 4](https://m.media-amazon.com/images/I/81Bzsfd+51L.jpg)
![50 Pack Heavy Duty Mushroom Grow Bags - 6 Mil Polypropylene Substrate Bags, Large Size 8" X 5" X 20" for Cultivation, Spawn, and Sawdust Fruiting Blocks - Image 5](https://m.media-amazon.com/images/I/71VZwh-OKGL.jpg)

## Available Options

This product comes in different **Size Name** options.

## Questions & Answers

**Q: How can I seal the bag without an impulse sealer?**
A: I use a vacuum sealer, without the vacuum.

**Q: Can this bag be autoclaved or put in a pressure cooker?**
A: Yes. I just ran four bags through the pressure cooker this week and they all came out in perfect condition.

**Q: Where do i inject i thought i could go through the filter but that doesnt seem like a good idea. Can i tape over my holes?**
A: i would buy some injection ports, tape them onto hte bag, and inject through that, otherwise you'll leave an opening on your bag and that's going to be a source of contamination. I bought 100 filter injection ports on amazon for like 9 bucks, and i just tape them to the exterior of my bags that dont come with their own ports, and inject through that. You'll have a much better success rate, if you leave any kind of opening you can expect that 40% of your bags (or more, depending on your conditions) will contaminate. Never inject directly through the plastic.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great bags
*by C***C on 28 February 2024*

This bag held up well in the pressure cooker (Instant Pot), they are an ideal size but can struggle to fit in the Instant Pot if you fill it too much. They lack an injection port which is the only down side.

## Frequently Bought Together

- Gymgit 50 Pack, Mushroom Grow Bags, Heavy Duty 6 Mil Polypropylene Mushroom Substrate Bags, Large Size 8" X 5" X 20" for Mushroom Cultivation, Spawn Bags, and Sawdust Fruiting Blocks
- Myco Labs Microppose Self Healing Injection Ports for Mushroom Spawn Bags and Jar Lids (50-Pack)
- Impulse Heat Sealer Machine Manual Bags, 12 Inch, for Sealing Plastic/PE PP Bags with Extra Replace Element Grip

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**Shop now:** [https://www.desertcart.dk/products/502708114-50-pack-heavy-duty-mushroom-grow-bags-6-mil-polypropylene](https://www.desertcart.dk/products/502708114-50-pack-heavy-duty-mushroom-grow-bags-6-mil-polypropylene)

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-01-24*