All-in-One Mushroom Grow Bag 4 lb | Grain + CVG Substrate – Midwest Grow Kits
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All-in-One Mushroom Grow Bag (4 lbs) for Manure Loving Mushrooms

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$2399
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All-in-one 4 lb grow bag with sterilized grain and substrate. Just inject spores or liquid culture and harvest—perfect for space-limited grows.

🔥 1360 purchased in the last 30 days
⭐ 13,000+ units sold

Description

The 4 lb All-in-One mushroom grow bag is the simplest bulk grow we sell: 1.75 lbs of sterilized milo, millet and rye grain and 2.25 lbs of CVG substrate in one self-supporting bag with a 0.22 micron filter patch and a self-healing injection port. Inject spores or liquid culture, incubate, break and shake, and fruit right in the bag.

4 lb All-in-One mushroom grow bag and its box with a tall fruiting bag on a light oak kitchen shelf
Grain and substrate in one sterile bag.

Inject, incubate, break and shake, and fruit right in the bag. No tub, no mixing, no substrate prep.

  • Grain + CVG in one bag
  • 0.22 micron filter
  • Self-healing port
  • Sterilized in-house
  • 4 lbsTotal bag
  • 1.75 lbsMilo, millet & rye
  • 2.25 lbsCVG substrate
  • 0.22 µmFilter patch
  • 72–76°FIncubation

Why growers pick the 4 lb All-in-One

All-in-One grow bag showing sterilized grain under CVG substrate, beside dishes of grain and coco coir
Everything in one bag

1.75 lbs of sterilized milo, millet and rye under 2.25 lbs of CVG substrate. Nothing to mix, measure or transfer.

Colonized and fruiting All-in-One grow bags on the shelves of a small indoor mini greenhouse with a humidifier
Fits a shelf or small tent

One bag fruits on a shelf or counter, and a small mini greenhouse holds several at once. No tub or extra equipment to get started.

Rows of All-in-One grow bags on wire racks in front of a Blue Myco commercial autoclave
Sterilized in-house

Every bag is pressure-sterilized in our own autoclave and shipped fresh, sealed behind a 0.22 micron filter patch.

How to grow in the bag

Four steps from sealed bag to harvest. All you add is spores or liquid culture.

Gloved hand injecting a syringe into the self-healing injection port of an All-in-One grow bag 1Inoculate

Shake the syringe, wipe the port with alcohol, and inject 4–5cc of spores or 5–10cc of liquid culture into the grain.

White mycelium spreading through the grain layer of an All-in-One grow bag on a warm shelf 2Incubate

Keep the sealed bag at 72–76°F, out of direct light, while mycelium spreads through the grain.

Hands breaking and mixing colonized grain through the substrate of a sealed All-in-One grow bag 3Break and shake

At roughly 50–75% colonization, break up the grain and mix it through the substrate.

Mushrooms fruiting inside a clipped All-in-One grow bag next to a spray bottle for misting 4Fruit

Once fully colonized, open the top, give it indirect light and fresh air, and mist the inside walls.

Full walkthrough: the All-in-One Grow Bag Guide covers inoculation, colonization, break-and-shake timing, fruiting conditions, harvesting and troubleshooting with real grow photos. Not sure how many syringes to buy? Use our syringe calculator.

Fruit in the bag, or move up to a tub

Fully colonized All-in-One grow bag fruiting mushrooms of mixed heights from the top Fruiting from the top of the bag
Start small, scale when you're ready

Most growers fruit right in the bag: fold the top down once it is fully colonized and mist the inside walls to hold humidity. When you want a wider fruiting surface, break the colonized bag into a 28Q monotub with our Monotub Upgrade Kit.

  • Fruits on a shelf or counter
  • Same steps as our XL 6 lb bag
  • Upgrades to a 28Q monotub
What you add

Spores or liquid culture, nothing else: 4–5cc of spores or 5–10cc of liquid culture.

Liquid culture usually colonizes faster than spores.

See it grow


Specifications

Specification Detail
Total weight 4 lbs
Grain 1.75 lbs milo, millet & rye, sterilized
Substrate 2.25 lbs CVG (coco coir, vermiculite, gypsum), sterilized
Bag Self-supporting filter grow bag
Filter patch 0.22 micron
Injection port Self-healing
Sterilization Pressure-sterilized in-house
Inoculation 4–5cc spores or 5–10cc liquid culture
Incubation 72–76°F

Pick your All-in-One setup

4 lb Bag XL 6 lb Bag Upgrade Kit Starter Kit
Use it for Your first bulk grow Bigger flushes, same steps Moving a 4 lb bag to a tub Bag and tub in one box
Contents 1.75 lbs grain + 2.25 lbs CVG 2 lbs 5-grain + 4 lbs substrate 28Q tub, 2 lbs substrate, filters, liner 4 lb bag, 28Q tub, 2 lbs CVG
Fruit it In the bag In the bag In a 28Q monotub In a 28Q monotub
You supply Spores or liquid culture Spores or liquid culture A colonized 4 lb bag Spores or liquid culture

Faster startsLiquid culture usually colonizes faster than spores. Our QuickCulture Mini liquid culture jars turn a spore syringe into vigorous liquid culture before you inoculate your bag. Shopping for genetics? Browse our liquid culture syringes or spores from Spore Genetics.


Common questions

What is an All-in-One grow bag?

A sterilized grow bag that holds grain spawn and bulk substrate together behind a filter patch. You inject spores or liquid culture, let the grain colonize, mix it into the substrate, and fruit in the same bag — no tub or separate substrate prep.

What is in the 4 lb bag?

1.75 lbs of sterilized milo, millet and rye grain and 2.25 lbs of CVG substrate (coco coir, vermiculite and gypsum), in a self-supporting bag with a 0.22 micron filter patch and a self-healing injection port.

How much spore solution or liquid culture should I use?

Inject 4–5cc of spores or 5–10cc of liquid culture through the injection port. Shake the syringe well first. Liquid culture generally colonizes faster than spores.

When should I break and shake?

When the grain is roughly 50–75% colonized. Breaking up the colonized grain and mixing it through the substrate spreads the mycelium and shortens the time to full colonization.

Do I open the bag while it colonizes?

No. Keep the bag sealed until it is fully colonized. The 0.22 micron filter patch lets the bag breathe while keeping contaminants out. Open the top only when you move to fruiting.

Can I get more than one flush?

Yes. After you harvest, mist the surface or give it a light soak to rehydrate, then keep the same fruiting conditions for the next flush. Later flushes are usually smaller than the first.

Can I move it to a monotub later?

Yes. Once the bag is fully colonized you can break it into a 28Q monotub with our Monotub Upgrade Kit for a wider fruiting surface.

Should I get the 4 lb or the XL 6 lb bag?

The 4 lb bag is the easiest start and fits the smallest space. The XL 6 lb bag uses the same steps with more grain and substrate for bigger flushes.

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