AMK Store Est. 2026
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.
The staples
STEP 01• CHOOSE WHAT CULTURE YOU WANT TO GROW
The range
Build your grow
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.
Bag mix is the cheapest combination of our bag sizes that covers what you need.
Grain guide
Four grains, one standard. Here is how they compare, in grower terms.
How it fits together
Introduce your culture to a bag of sterilised grain through the injection port.
Sterilised grainLet the mycelium run through every kernel until the bag turns white.
Agar for clean startsBreak up the colonised grain and mix it through your substrate.
Premium CVA substrateGive it fresh air, humidity and light, then harvest your flush.
All-in-ones do 01 to 03 in one bagThe culture library Coming soon
The library is being catalogued now. Join the drop list and you will hear the moment it opens.
The kingdom standard
Grain and substrate both arrive sterilised and sealed, ready to use.
Our CVA recipe has been refined over years of growing for consistent results.
Prepared with proven methods and carefully selected nutrients for a strong start.
Grain bags carry an injection port. Substrate bags breathe through a filter patch.
Questions
Something not covered here? Ask us and we will add it.
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.
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.
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.
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.
Keep them sealed, somewhere cool, clean and out of direct sunlight, and use them soon after they arrive.
They are being prepared now. Join the drop list and you will hear first.
Sterilised grain, premium substrate and everything coming next.
Premium Substrates
Coco coir, Vermiculite, Worm castings, Azomite
CVWA is a highly nutritious substrate that has become an excellent alternative to traditional manure-based recipes.
Our carefully crafted, extensively tested formula is packed with essential nutrients to support strong, healthy growth and consistent performance.
Proven to deliver excellent results, CVWA has quickly become a game changer in the mycology community.
CVWA is coco coir, vermiculite, worm castings and Azomite. The worm castings and mineral dust bring the nutrition and the microbial richness that growers used to get from composted manure, without the sourcing problems, the smell and the batch-to-batch variability. It is hydrated, sterilised and sealed with a filter patch, and it has become our pick for growers who want the biggest, most vigorous flushes from compost-loving species.
Sizes and prices: 1kg for $35 and 2kg for $65. Prices in AUD, GST inclusive where it applies, shipped tracked Australia-wide.
| CVA | CVWA | |
|---|---|---|
| Base | Coco coir, vermiculite, minerals | Coco coir, vermiculite, worm castings, Azomite |
| Nutrition | Moderate: the spawn carries most of it | High: castings and minerals feed the substrate itself |
| Forgiveness | Very forgiving, good first substrate | Richer, so clean spawn and a sensible ratio matter more |
| Best for | Oysters, first grows, tubs | Compost lovers and growers chasing bigger flushes |
Exactly like CVA: spawn at 1:2 to 1:4 by weight in a clean space, colonise in a tub or the bag at room temperature in the dark, then fruit with fresh air, indirect light and 85 to 95% humidity. Because the mix is richer, lean towards the 1:2 end of the ratio for your first run with it.
Questions
Coco coir, Vermiculite, Worm castings and Azomite, a natural mineral dust used for trace elements.
Castings deliver similar nutrition and biology with none of the variability or smell of manure, and they sterilise cleanly. The result is consistent, bag after bag.
1:2 by weight is the safe choice for a rich substrate. Experienced growers run it leaner once they trust their spawn.
Species that would traditionally be grown on a manure-based mix, and oysters, which enjoy the extra nutrition. Wood lovers (lion's mane, shiitake, king oyster, reishi) still want the hardwood substrate.
Guides for this product
All guidesSubstrates 3 min read
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.
Troubleshooting 4 min read
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.
A few details, then you pay on a secure page.
The drop list
Restocks, new cultures and first dibs on grow kits. One email when something lands, nothing more.
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