Sterilised Grain
Sterilised Grain
Nutrient-enhanced grain, sterilised and sealed in injection-port bags. Wheat, oats, corn or milo.
From$35
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.
Shop all
Sterilised grain, premium substrate and everything coming next.
All-in-One Grow Bags
All-in-One Grow Bag
Sterilised grain and substrate layered in one bag. Inoculate, colonise, mix, fruit.
From$40
Premium Substrates
PREMIUM CVA SUBSTRATE
Our refined CVA recipe, sterilised and bagged with a filter patch. 1, 2 or 5kg.
From$30
Premium Substrates
Wood Lovers Substrate
Our refined wood lovers recipe, sterilised and bagged with a filter patch. 2 or 4kg.
From$30
Pre-Poured Agar Plates
Pre-Poured Agar Plates High nutrition
Poured, set and ready for clean culture work: isolating, cleaning up and expanding.
From$25
Pre-Poured Agar Plates
Pre-Poured Agar Plates Low Nutrition
Poured, set and ready for clean culture work: isolating, cleaning up and expanding.
From$20
Gourmet & Medicinal Cultures
Gourmet & Medicinal Cultures
Lion's mane, oysters, shiitake, reishi, cordyceps and more. The library is being catalogued now.
Coming soonGet notified
Grow Kits
Gourmet Grow Kits
Everything you need to grow gourmet mushrooms at home, in one box.
Coming soonGet notified
Colonised Grain Spawn
Colonised Grain Spawn
Inoculated grain, fully colonised ready for use.
From$60
Sold out
Substrates
Substrates
Nutrient rich substrates, be sure to select the correct substrate for your culture. CVA COCO COIR BASED OR HWP FOR WOOD LOVERS
From$25
Everything for the grow, made in Australia
This is the whole shelf: Sterilised Grain, Premium Substrates, All-in-One Grow Bags, Pre-Poured Agar Plates, Gourmet & Medicinal Cultures, Grow Kits, Substrates and Colonised Grain Spawn. Every bag is prepared, sterilised and sealed here and shipped tracked, Australia-wide. If you are new, start with the beginner's guide or let the grow builder pick a setup for the tub you have.
In stock now: Sterilised Grain from $35 (1kg, 2kg), All-in-One Grow Bag from $40 (1kg, 2kg), Premium CVA Substrate from $30 (1kg, 2kg, 5kg), Wood Lovers Substrate from $30 (2kg, 4kg), Pre-Poured Agar Plates High nutrition from $25 (5 plates, 10 plates, 20 plates, 30 plates, 50 plates), Pre-Poured Agar Plates Low Nutrition from $20 (5 plates, 10 plates, 20 plates, 30 plates, 50 plates), Colonised Grain Spawn from $60 (1kg, 2kg), Substrates from $25 (CVA 1kg, CVA 2kg, CVA 5kg, HWP 2kg, HWP 4kg) and Premium CVWA Substrate from $35 (1kg, 2kg). Orders ship Australia-wide, tracked, from $15. See delivery.
How the range fits together
- Culture
A liquid culture or agar plate of the species you want. Gourmet and medicinal cultures are coming soon.
- Grain
Inoculate a sterilised grain bag and let it colonise into spawn, or skip the wait with colonised grain spawn.
- Substrate
Mix the spawn through a substrate: coir-based for oysters, hardwood for lion's mane and shiitake.
- Fruit
Humidity, fresh air, light, harvest. Or do steps two and three in one bag with an all-in-one.
Questions
Good to know
Do you ship Australia-wide?
Yes, every order ships tracked to any Australian address. Standard and express options are shown at checkout; see the delivery page for prices by weight.
Is everything sterilised?
Grain, substrate and all-in-one bags are fully sterilised in an autoclave cycle and sealed with a filter patch. Agar plates are poured and set in a clean environment and sealed.
What do I need for a first grow?
A culture of the species you want, a sterilised grain bag (or colonised spawn), a substrate bag and somewhere humid to fruit it. Or one all-in-one bag plus a culture. The checklist spells it out.
Do you sell spores?
No. We sell growing supplies and, soon, live cultures of gourmet and medicinal species. Everything here is for growing edible and medicinal mushrooms at home.
Read before you buy
All guidesStart here 5 min read
How to grow mushrooms at home in Australia: the complete beginner's guide
Four moves, one kitchen bench and a few weeks. Here is the whole process from a culture syringe to a harvest, with the Australian specifics that the overseas guides leave out.
Start here 3 min read
Mushroom growing supplies checklist: what you actually need, and what can wait
You can spend a thousand dollars on a flow hood and a tent, or forty on a bag and a syringe. Here is what each item actually does, so you can buy in the right order.
Grain & spawn 3 min read
Grain spawn to substrate ratio: how much spawn you actually need
More spawn is faster and safer, less spawn is cheaper. Here is where the sweet spot sits for coir tubs and hardwood blocks, and a calculator that does the sums.
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.