--- product_id: 145010563 title: "Reinforced Mushroom Grow Bags, 25 Count, Oyster Spawn and Grain Root Substrate Growing Kit with 0.2 Micron Filter”, Heavy Duty 3 Mil Polypropylene Plastic" brand: "the magnificent bee" price: "¥9476" currency: JPY in_stock: true reviews_count: 13 category: "The Magnificent Bee" url: https://www.desertcart.jp/products/145010563-reinforced-mushroom-grow-bags-25-count-oyster-spawn-and-grain store_origin: JP region: Japan --- # Large 8x5x20 inch grow bags 0.2 micron breathable filter patch 3-mil heavy-duty polypropylene Reinforced Mushroom Grow Bags, 25 Count, Oyster Spawn and Grain Root Substrate Growing Kit with 0.2 Micron Filter”, Heavy Duty 3 Mil Polypropylene Plastic **Brand:** the magnificent bee **Price:** ¥9476 **Availability:** ✅ In Stock ## Summary > 🍄 Grow Bold, Grow Smart — Your Premium Mushroom Garden Starts Here! ## Quick Answers - **What is this?** Reinforced Mushroom Grow Bags, 25 Count, Oyster Spawn and Grain Root Substrate Growing Kit with 0.2 Micron Filter”, Heavy Duty 3 Mil Polypropylene Plastic by the magnificent bee - **How much does it cost?** ¥9476 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/145010563-reinforced-mushroom-grow-bags-25-count-oyster-spawn-and-grain) ## Best For - the magnificent bee enthusiasts ## Why This Product - Trusted the magnificent bee brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Versatile & Reusable:** Autoclavable and sturdy enough for multiple grow cycles—perfect for the eco-conscious grower. - • **Breathe Easy, Grow Better:** Integrated 0.2 micron filter patch ensures optimal gas exchange while blocking contaminants. - • **Built to Last, Grow to Impress:** Durable 3-mil polypropylene withstands up to 10 lbs of substrate without tears or leaks. - • **Seal in Freshness, Seal out Worries:** Transparent, sealable tops lock in moisture and protect your crop with ease. - • **Size Matters for Serious Cultivators:** Generous 8x5x20 inch bags maximize substrate volume for bigger, healthier mushroom yields. ## Overview The Magnificent Bee Reinforced Mushroom Grow Bags come in a 25-count set, crafted from heavy-duty 3-mil polypropylene plastic designed to support up to 10 lbs of substrate. Featuring a 0.2 micron breathable filter patch, these large 8x5x20 inch bags provide optimal aeration while preventing contamination. Their transparent, sealable design ensures moisture retention and easy monitoring, making them ideal for growing oyster, morel, enoki, and other mushrooms at home with professional-grade reliability. ## Description desertcart.com : The Magnificent Bee Reinforced Mushroom Grow Bags, 25 Count, Oyster Spawn and Grain Root Substrate Growing Kit with 0.2 Micron Filter”, Heavy Duty 3 Mil Polypropylene Plastic : Patio, Lawn & Garden Review: Bomb proof grow BAGS(not kits) for worry free production. - There seems to be some confusion from a few of the reviewers that this is supposed to be a kit, and rated it poorly because they only received bags. The Title and description clearly state All in one grow bags, NOT a kit. If you actually read and pay attention to the listing and pictures, it's obvious that these are bags only. All in one is referring to the bags having a prepared filter port meaning they are ready to use without any additional alterations. Now with the confusion out of the way, on to the real review. The quality of the bags is much better than some of the other brands that I have tried. They are a little more expensive compared to some others at the $.998/ea cost that I paid, but I had zero failures in bag structure or performance and zero contamination. The 3 mil is very durable, seals easily and completely without leaking or tears when I use an impulse sealer. With this thickness they are easy to stand up and fill, I am never concerned or careful moving full bags around, or worrying about seams or punctures. I've even used a few of these bags more than once for grain spawn(something I had never even considered trying with other bags) just to see if I could, and they actually worked perfectly. The .2 micron filter patch has been perfect for contamination free fresh air exchange. Bottom line, if you are looking for a sturdy, well made reliable grow bag that can handle 5lbs (or more) of substrate this is an excellent choice. I will definitely be purchasing more in the future. Review: Good quality - These are really nice bags, plastic is thick. Size is bigger than I expected but that just means more substrate and more mushrooms! ## Features - ALL-PURPOSE MUSHROOM GROWING BAGS – These large mushroom grow bags are designed to help you grow fresh, healthy morels, oyster, enoki, portabella, and other mushroom types for a homegrown garden you can start in your backyard. - HEAVY-DUTY POLYPROPYLENE PLASTIC – Our mushroom spawn bags are made from 3-mil polypropylene that supports a 5-10 lbs. spawn block and provides a stronger, more reliable growing area conducive with natural mushroom growth. - BREATHABLE BAG WITH FILTER PATCH – A smarter design our mushroom substrate bags also features a 0.2’ filter patch that allows for optimal gas exchange for aeration and nourishment while preventing contaminants from impacting soil composition. - LARGE MUSHROOM GROWTH BAGS – The larger 8” x 5” x 20” bag size allows you to use them for both traditional mushroom growing and spawn. They’re also autoclavable and have microporous filter patches to better support your growth process. - TRANSPARENT WITH SEALABLE TOP – The thickest grow bags available The Magnificent Bee Store substrate bags for mushrooms can be sealed with a quick tie or an impulse sealer (not included) to help protect plants while also sealing in essential moisture. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07PZ27PN9 | | Best Sellers Rank | #77,788 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #153 in Plant Grow Bags | | Brand Name | The Magnificent Bee | | Capacity | 10 pounds | | Color | Transparent | | Customer Reviews | 4.4 out of 5 stars 427 Reviews | | Finish Types | Unfinished | | Included Components | Plant Hanger | | Indoor Outdoor Usage | Indoor | | Item Dimensions | 1 x 2 x 2 inches | | Item Dimensions D x W x H | 1"D x 2"W x 2"H | | Item Weight | 16 ounces | | Manufacturer | The Magnificent Bee | | Manufacturer Part Number | Mushroom | | Material | Polypropylene (PP) Plastic | | Material Type | Polypropylene (PP) Plastic | | Model Number | Mushroom | | Mounting Type | Floor Standing | | Number of Levels | 1 | | Number of Pieces | 25 | | Other Special Features of the Product | Reinforced | | Pattern | Solid | | Plant or Animal Product Type | plant | | Planter Form | Bag | | Product Style | Garden | | Set Name | Magnificent Bee Mushroom Grow Bag Set (25 Count) | | Shape | Rectangular | | Size | 25 Pack | | Special Feature | Reinforced | | Style | Garden | | UPC | 798753043404 | | Unit Count | 25 Count | ## Product Details - **Color:** Transparent - **Material:** Polypropylene (PP) Plastic - **Planter Form:** Bag - **Special Feature:** Reinforced - **Style:** Garden ## Images ![Reinforced Mushroom Grow Bags, 25 Count, Oyster Spawn and Grain Root Substrate Growing Kit with 0.2 Micron Filter”, Heavy Duty 3 Mil Polypropylene Plastic - Image 1](https://m.media-amazon.com/images/I/81HsdZP93PL.jpg) ## Questions & Answers **Q: Why are all these rookies not capable of understanding that this product is for bags and not a grow kit?** A: The description was misleading it says it’s a kit with the oyster mushrooms and growing medium. You need to change the description and you shouldn’t be hateful to legitimate customers. **Q: How do you inoculate if there is no self healing port** A: You install your own port with thermal(hi temp) silicone sealant or... don't seal the bags just use tyvek as filter and fold over a few times. **Q: Do I need 8" or 12" impulse sealer to seal those bags?** A: I use a 12" sealer. The bags are exactly 8", my concern was; will i get a tight seal on the ends of the 8" sealer? I'm Still Not sure so i want big. **Q: Is there a video on how to use these?** A: Look on YouTube, that’s what I did ## Customer Reviews ### ⭐⭐⭐⭐⭐ Bomb proof grow BAGS(not kits) for worry free production. *by J***S on June 1, 2020* There seems to be some confusion from a few of the reviewers that this is supposed to be a kit, and rated it poorly because they only received bags. The Title and description clearly state All in one grow bags, NOT a kit. If you actually read and pay attention to the listing and pictures, it's obvious that these are bags only. All in one is referring to the bags having a prepared filter port meaning they are ready to use without any additional alterations. Now with the confusion out of the way, on to the real review. The quality of the bags is much better than some of the other brands that I have tried. They are a little more expensive compared to some others at the $.998/ea cost that I paid, but I had zero failures in bag structure or performance and zero contamination. The 3 mil is very durable, seals easily and completely without leaking or tears when I use an impulse sealer. With this thickness they are easy to stand up and fill, I am never concerned or careful moving full bags around, or worrying about seams or punctures. I've even used a few of these bags more than once for grain spawn(something I had never even considered trying with other bags) just to see if I could, and they actually worked perfectly. The .2 micron filter patch has been perfect for contamination free fresh air exchange. Bottom line, if you are looking for a sturdy, well made reliable grow bag that can handle 5lbs (or more) of substrate this is an excellent choice. I will definitely be purchasing more in the future. ### ⭐⭐⭐⭐⭐ Good quality *by A***A on October 20, 2025* These are really nice bags, plastic is thick. Size is bigger than I expected but that just means more substrate and more mushrooms! ### ⭐⭐⭐⭐ Hold plenty of material. *by H***. on March 12, 2025* They worked well. They withstood 15 psi. Only problem was that 2 of them open once they were sealed ## Frequently Bought Together - The Magnificent Bee Reinforced Mushroom Grow Bags, 25 Count, Oyster Spawn and Grain Root Substrate Growing Kit with 0.2 Micron Filter”, Heavy Duty 3 Mil Polypropylene Plastic - MushroomMediaOnline - 100% Soy Hull Mushroom Pellets - Ideal and Fast-Growing Substrate for Mushroom Cultivation, Oyster Mushrooms, Shiitake, and More (10, Pounds) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/145010563-reinforced-mushroom-grow-bags-25-count-oyster-spawn-and-grain](https://www.desertcart.jp/products/145010563-reinforced-mushroom-grow-bags-25-count-oyster-spawn-and-grain) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-29*