Lab & agar 3 min read
Still air box vs flow hood: clean inoculation at home, on any budget
Mould spores fall through air. One tool stops the air moving; the other pushes clean air at you. Both work. One costs ten dollars.
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.
The AMK blog
Grow guides for Australian growers.
Plain-English answers to the questions people actually search: which grain, how much spawn, what substrate, how to keep it clean and what to grow this season. New guides land every week.
Latest
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.
Species guides 3 min read
Mushroom growing by season and state: what to grow in Australia right now
A room in Darwin and a room in Hobart are different planets to a mushroom. Here is what to grow where, and when.
Start here
First grow, no guesswork.
What to buy, what it costs and how the pieces fit together, written for people who have never grown a mushroom.
Start 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.
Start here 3 min read
The best mushrooms to grow for beginners in Australia
Some species forgive a missed mist and a warm afternoon. Some do not. Start with the ones that do.
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.
Grain & spawn
Everything grain.
Sterilised grain, grain spawn, which grain to pick and how much you need for the substrate you are filling.
Grain & spawn 3 min read
Sterilised grain bags explained: what they are, how to use them and how to keep them clean
The injection port, the filter patch, the 2 to 5 ml, the three weeks. Everything a grain bag does and everything you do to it.
Grain & spawn 3 min read
Which grain is best for mushroom spawn? Wheat vs oats vs corn vs milo
Four grains, one standard. The differences are real but smaller than the forums suggest, and they mostly come down to kernel size.
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.
Substrates
What your mushrooms eat.
Coir blends, hardwood pellets, manure-free recipes and the right substrate for every species.
Substrates 3 min read
Mushroom substrate guide: coir, hardwood and the right one for every species
Substrate is dinner. Oysters will eat almost anything; lion's mane and shiitake want wood. Match the menu to the species and most problems never happen.
Substrates 3 min read
Coco coir mushroom substrate (CVA): what is in it, who it suits and how to run a tub
Coir is the substrate that made home growing easy: clean, cheap, forgiving and endlessly thirsty. Here is what our CVA blend adds and how to use a bag of it.
All-in-ones & kits
The one-bag grows.
All-in-one grow bags and grow kits: instructions, expectations and how to get a second flush.
All-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.
Species guides
Grow this.
Lion's mane, oysters, shiitake, reishi and the medicinals, with the conditions that suit Australian rooms and seasons.
Species guides 3 min read
How to grow lion's mane at home in Australia
A soft white pom-pom that tastes like crab and fruits from a hole in a bag. Lion's mane is the mushroom that turns kit buyers into growers.
Species guides 3 min read
How to grow oyster mushrooms at home in Australia: pink, blue, pearl and king
The fastest, most forgiving mushrooms you can grow, in four colours for four climates. The only rule they enforce is fresh air.
Species guides 3 min read
Mushroom growing by season and state: what to grow in Australia right now
A room in Darwin and a room in Hobart are different planets to a mushroom. Here is what to grow where, and when.
Lab & agar
Clean work.
Agar plates, liquid culture, still air boxes and the habits that keep a culture clean.
Lab & agar 3 min read
Agar plates for beginners: isolating a clean mushroom culture
Agar is where luck stops being part of the method. One plate shows you what a culture really is before you spend three weeks finding out in a grain bag.
Lab & agar 3 min read
Still air box vs flow hood: clean inoculation at home, on any budget
Mould spores fall through air. One tool stops the air moving; the other pushes clean air at you. Both work. One costs ten dollars.
Troubleshooting
When it goes sideways.
Contamination, stalled bags and the fixes that actually work.
Troubleshooting 4 min read
Mushroom contamination guide: green mould, wet spot, cobweb and what to do about each
Every grower meets these. The ones who keep growing are the ones who learned to recognise them on sight and throw the bag out without a second thought.
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.