Premium Sterilised Mushroom Grain Spawn Bags (1kg)

(10 customer reviews)


  • Contaminant-free
  • Filter patch for gas exchange
  • Self Healing Injection Port
  • Ready to inoculate
  • Viking Guarantee


SKU: GB Categories: ,

Premium Sterilised Mushroom Grain Spawn

Our mushroom grain spawn bags are produced to be of the highest quality on the market; to ensure bountiful flushes of your mushrooms. Carefully sterilized and completely ready to innoculate.

We take great pride in our attention to detail and sterile techniques ensuring you will receive nothing but the best possible product.

How long do they last? Can I store them?

Great question! Sterilised grains will not technically go ‘bad’ but they can lose moisture through the filter over time.

If you plan to use your bags within 1 week they can stay in a cool, dark place.

If you plan to store them longer, put them inside a sealed bag and store them in the fridge for up to 2 months.

How much spore/culture solution should I use?

For liquid cultures, I would recommend 5ml per 1kg bag

For spore solution, you can use between 2-5ml (5ml is a little faster)

What grain is used?

We use organic, pest-free rye grain

The grain is selected by the freshest quality that’s in season, only organic, pesticide-free grain is used.

Our mushroom grain spawn comes double heat-sealed in a sterile, filter-patch grow bag from the American made Unicorn bags.

These bags are guaranteed to arrive with you 100% sterile and ready to inoculate with your favourite mushrooms culture!

At Viking Spores, we’ve been producing mushroom grain spawn for years and we’ve picked up a thing or two on what makes fantastic spawn.

Each batch is hand-made to our exact specification. Ensuring perfect hydration, consistency and quality.

Backed by our guarantee. You can rest easy knowing you’ll get a quality product, every time.

We absolutely love to hear your feedback on our products, it’s what lets us know what we’re doing right and what needs improvement.

We like to think that sets us apart as we are always improving to produce only the BEST products. You can read our reviews by clicking the link in the footer.

Our mushroom grain bags are handmade and only sterilized in small batches.

This means you get always the freshest and best quality grain bags delivered to your door. Allow us a couple of days to get this delivered to you.

Thinking of making your own? we sell empty bags that you can add your own mushroom grain spawn to and sterilise.

Empty pre-seal mushroom bags

making your own bags is exciting and fun, but if you haven’t got your technique and procedures and equipment down perfectly, there leaves a lot of room for things to go wrong down the line. Often causing months of headaches. If you’re just starting to produce your own, we’d recommend getting a few of our ready bags to act as a control =)


1 Bag (1kg), 2 Bags (2kg), 3 Bags (3kg), 4 Bags (4kg)

10 reviews for Premium Sterilised Mushroom Grain Spawn Bags (1kg)

  1. Paige R.

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    All top notch, I have previously ordered from elsewhere (not having heard of you) and the difference in quality is quite literally day and night, very impressed, great communication, very friendly customer service. Thankyou Dominic, as I’ve said wouldn’t hesitate to recommend wholeheartedly to all. Fab all round. Thank you so much.

    (1) (1)
  2. Kyle H.

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    Perfect and on time great at responding aswell all round perfect and I’ll be coming back regularly

    (1) (1)
  3. Paul

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    Everything from Dominic arrives quickly in great condition, great service

    (1) (0)
  4. Moik

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    Looks great

    (0) (1)
  5. Connor T.

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    (1) (1)

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