All-in-One Grow Bags
All-in-One Grow Bag
Sterilised grain and substrate layered in one bag. Inoculate, colonise, mix, fruit.
From$40
AMK Store Est. 2026
Sub & grain fit for a kingdom.
Sterilised grain and premium CVA substrate for gourmet and medicinal mushroom growers. All-in-one grow bags, pre-poured agar, cultures and grow kits are on the way.
- Sterilised
- Injection-port grain bags
- Filter-patch sub bags
The staples
EVERY GROW STARTS WITH THESES STEPS
STEP 01• CHOOSE WHAT CULTURE YOU WANT TO GROW
The range
Everything for the grow.
Build your grow
How much grain do you actually need?
Tell us how much substrate you are filling and the spawn ratio you like. We will work out the grain, pick the cheapest mix of bag sizes, and bag the lot in one click.
Substrate
Grow docketAMK Store
2.5kg grain
+
5kg substrate
Total$0
Bag mix is the cheapest combination of our bag sizes that covers what you need.
Grain guide
Pick your grain.
Four grains, one standard. Here is how they compare, in grower terms.
How it fits together
Plate to harvest in four moves.
-
01
Inoculate
Introduce your culture to a bag of sterilised grain through the injection port.
Sterilised grain -
02
Colonise
Let the mycelium run through every kernel until the bag turns white.
Agar for clean starts -
03
Spawn to sub
Break up the colonised grain and mix it through your substrate.
Premium CVA substrate -
04
Fruit
Give it fresh air, humidity and light, then harvest your flush.
All-in-ones do 01 to 03 in one bag
The culture library Coming soon
Gourmet & medicinal, on the bench.
The library is being catalogued now. Join the drop list and you will hear the moment it opens.
The kingdom standard
Made properly, bagged properly.
Sterilised
Grain and substrate both arrive sterilised and sealed, ready to use.
A refined recipe
Our CVA recipe has been refined over years of growing for consistent results.
Nutrient-enhanced grain
Prepared with proven methods and carefully selected nutrients for a strong start.
Proper bags
Grain bags carry an injection port. Substrate bags breathe through a filter patch.
Questions
Good to know.
Something not covered here? Ask us and we will add it.
What is the difference between grain and substrate?
Grain is what you inoculate first. Once the mycelium has colonised it, that grain becomes spawn, and you mix it through the substrate: the bulk material your mushrooms fruit from.
Which grain should I choose?
Wheat is the all-rounder. Oats and milo break apart easily, and milo gives you the most inoculation points per kilo. Corn has the biggest kernels. The grain guide compares all four.
How much grain do I need for my substrate?
It depends on your spawn ratio. At 1:2 you use one part grain to two parts substrate, so 5kg of substrate takes 2.5kg of grain. The grow builder does the maths and picks the bag sizes.
What is an all-in-one grow bag?
Sterilised grain and substrate layered in one bag with an injection port. You inoculate the grain, let it colonise, then mix it through the substrate without opening the bag. They are coming soon.
How should I store my bags?
Keep them sealed, somewhere cool, clean and out of direct sunlight, and use them soon after they arrive.
When do cultures, agar and grow kits land?
They are being prepared now. Join the drop list and you will hear first.
All-in-One Grow Bags
Grain and substrate layered in one sterilised bag. Coming soon.
Grain and substrate in one sterilised bag
An all-in-one grow bag layers sterilised, nutrient-enhanced grain under a bed of sterilised substrate, in one filter-patch bag with a self-healing injection port. You inoculate the grain layer through the port, wait for it to colonise, then knead the colonised grain through the substrate without ever opening the bag. When the whole bag is white you cut it open and fruit from it. It is the simplest route from a culture syringe to a harvest, and the one we recommend to first-time growers.
On this page: All-in-One Grow Bag from $40 (1kg, 2kg). Orders ship Australia-wide, tracked, from $15. See delivery.
How an all-in-one grow works
- Inoculate
Wipe the port with 70% alcohol, flame the needle and inject 2 to 5 ml of liquid culture into the grain layer at the bottom of the bag.
- Colonise the grain
Keep the bag at 20 to 26°C in the dark. When the grain is mostly white (one to three weeks depending on species), gently break it up through the bag.
- Mix
Massage the colonised grain through the substrate layer, flatten the bag and let it run again. The substrate goes white over the next one to three weeks.
- Fruit
Cut the bag open or cut a window, add humidity and fresh air, and harvest when the caps say so. Full instructions in the all-in-one guide.
Pick a grain, pick a size
Oats, wheat and corn are all good in an all-in-one. Oats break up with the least effort, which makes the mixing step easier through a sealed bag. Choose the 1kg bag for a first grow or a windowsill; the 2kg bag for a bigger flush and a second one after it.
Questions
Good to know
What is an all-in-one grow bag?
A single sterilised bag containing a layer of grain and a layer of substrate, with a filter patch and an injection port. You inoculate the grain, let it colonise, mix it through the substrate inside the bag and fruit from the same bag.
Do I need a culture to use it?
Yes. The bag is sterile and contains no mycelium; you add a liquid culture of the species you want to grow through the injection port. Our gourmet and medicinal cultures are coming soon, and any clean gourmet liquid culture works.
How long from injection to mushrooms?
Roughly 4 to 8 weeks for oyster mushrooms: one to two weeks for the grain, one to three weeks for the substrate after mixing, then a week or so from pins to harvest. Slower species take longer.
Can I get more than one flush from a bag?
Usually two, sometimes three. After the first harvest, let the block rest, rehydrate it with a soak if it feels light, and return it to fruiting conditions.
Is an all-in-one better than grain plus substrate?
It is easier and needs no clean mixing step. Buying grain and substrate separately gives you more control over the ratio and lets you grow more from one spawn bag, which is better value at scale.
Read before you buy
All guidesAll-in-ones & kits 4 min read
All-in-one grow bag instructions: inoculate, colonise, mix and fruit, stage by stage
One bag, one syringe, about six weeks. Here is what you do at each stage and what the bag should look like while you wait.
Start here 3 min read
Grow kit, all-in-one bag or bulk grow? Which one is right for you
Three ways in, three different trade-offs. Kits are for eating, all-in-ones are for learning, bulk is for volume.
Checkout
A few details, then you pay on a secure page.
The drop list
Join the kingdom.
Restocks, new cultures and first dibs on grow kits. One email when something lands, nothing more.