Australian certified Organic Rye grain 12.5kg

$85.00 inc. GST

14 in stock

SKU ORYE125 Categories ,


Australian-certified organic rye grain

Our Rye berries are Australia Certified Organic (ACO). This means it rest assures the berries are free of harmful chemicals and pesticides, which could be detrimental to healthy mycelium growth. Moreover, its high quality allows for long sterilisation periods, ensuring sterility and increasing chances of success.

Why do we use Rye grains?

Organic Rye grains are carefully selected for their high nutritional value, making them the perfect spawn for mushroom cultivation. When compared to Millet and Wheat, Rye has shown greater protein and fibre content, according to They are also easier to clean due to their manageable size. Moreover, it is one of the most common grains used in Mycology, making it easy to find ratios, recipes, tips and tricks in some of the most acclaimed books and websites.

You also can buy Pre sterilised Rye in 500 g, 1 Kg and 2 Kg Variants.

How do we prepare Rye grains to grow mushrooms?


  • Wash your grains thoroughly; they may contain dust, bugs and undesirable residues. We recommended rinsing them in a bucket 5 times or until the water is clear.
  • Soak the grains in a bucket, covering them completely for 12 – 24 hours. They will absorb the much-needed water for the mycelium to grow.
  • Cook the grains to increase water absorption further and soften them, making it easy for the mycelium to digest. Avoid overcooking, as it may reduce the nutrition available to mycelium. We recommend cooking them for 30 minutes in a large pot at high heat or half the time in medium to small pots.
  • Drain the grains using a mesh or strainer-like device to remove excess water.
  • Add gypsum and calcium carbonate. The gypsum will prevent the grains from sticking with each other, whilst the calcium carbonate will adjust the berries’ PH. PH adjustment is considered to increase yields. Adding 5% of the total weight (after water absorption) is recommended. Mix thoroughly.
  • Sterilise. Fill up your mason jars (containing air filter and injection port) and place them in the steriliser. Alternatively, Mushroom bags might be used. We recommend sterilising them for a total of 2 hours and 30 minutes. Never fill your jar or bag at more than 60% capacity to allow the gaseous exchange to take place.
  • Once the cycle is complete and the jars/bags cool down, inoculate your spawn with your culture of choice. Please follow the right procedures to avoid the chances of contamination. Grains can be inoculated with any media. It includes liquid culture, grain spawn, and agar plates.
  • After inoculation, label your spawn with the date and the culture name.

What Ratios do I need to consider with my product?

The water retention rate of our berries (Following the procedures mentioned above) is about 73%. It means that the final weight of your berries is 73% more than their dry weight. Multiply your dry weight by 73%, then add the resulting number to your original weight.

For example, if you soak and cook 5.2kg of Rye, you will end up with 9kgs. To calculate any desired final weight, use the following formula:


*We are using the quantities above as an example; replace the entries with your own quantities*

  • 5.2*73%= 3.8
  • 5.2+3.8= 9 kgs

Find another Mushroom Grain Bags in our store


Shipping Cost – The product is shipped via Australia Post using Express Post service for $20. If multiple items are in the cart with varying shipping costs, only the highest shipping cost for a product in the cart will be charged.

Handling time- This product has 0 days handling time and is shipped the same day if ordered before 12 pm. However, it’s important to note that if other items are in your cart, the handling time may vary based on the handling time associated with those additional items. Handling time is not guaranteed during the busy holiday period.

Shipping time- Australia Post guarantees express post is delivered the next day in metro regions of Capital cities, but give it anywhere from 1-3 days for this package to reach you. Shipping times are not guaranteed during the busy holiday period.


Join Waitlist We will inform you when the product arrives in stock. Please leave your valid email address below.
    Your Cart
    Your cart is emptyReturn to Shop
      Calculate Shipping
      Apply Coupon