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.
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.
Coming soon
Start to harvest
Gourmet Grow Kits
Everything you need to grow gourmet mushrooms at home, in one box.
Coming soon
Not on the shelf yet. Leave your email and we will tell you the day it lands.
About
Everything you need to grow gourmet mushrooms at home, in one box.
Kits are on the way. Join the drop list and you will hear first.
Details
- Level
- Beginner friendly
Open, mist, harvest
A grow kit is a block of substrate that has already been colonised by the mushroom you want to eat. Open the box, cut the bag, mist a few times a day, and pins show within days. It needs no sterilising, no spawn and no tub, and it is the gentlest way to find out whether growing mushrooms is for you. Ours are built on the same substrates and cultures as the rest of the shelf, so a kit grower who wants more can step straight up to bags and grain.
Kits are being prepared now. Leave your email above and you will hear the day they land.
What a kit gives you
- First mushrooms in 7 to 14 days after opening, depending on species and room temperature.
- Two flushes as standard, three with a rest and a soak between them.
- No equipment. A spray bottle, a bright spot out of direct sun, and a kitchen bench.
Which kit to pick
Oysters for the biggest, fastest first flush and the most forgiving grow. Lion's mane for cooler rooms and a mushroom that is hard to buy fresh. The grow kit guide compares what to expect from each, and the beginner species guide goes species by species.
Questions
About this product
How long does a grow kit take?
Pins usually appear 5 to 10 days after opening and are ready to harvest about a week later.
How many mushrooms will I get?
A first flush from a 1.5 to 2kg block is commonly 150 to 400g fresh, with oysters at the top end. A second flush is smaller.
Where should I keep the kit?
Indoors, in indirect light, away from direct sun, heaters and air-conditioning vents. Humidity is the thing that matters most.
Can I reuse a kit?
After the flushes are done, crumble the block into the garden or compost. Oyster blocks often fruit again outdoors after rain.
Guides for this product
All guidesCheckout
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.