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Premium Sterilised Mushroom Grain Spawn Bags (1kg)

(4 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 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.

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!

What grain is used?

Only the highest quality in-season, pesticide-free grain. Organic to ensure the best yields and biggest mushrooms.

How many ML of spore solution should I use?

Per 1KG bag of grain spawn you can use between 3-5ml of spore solution and 5-10ml of liquid culture.

How long do they last?

Ideally, you should use them as soon as possible. Although It’s perfectly fine to store them in the fridge for a couple of months. If you do this, put them inside a sealable bag to avoid any moisture loss through the filterO

Do they have a gurantee?

At Viking Spores, we make all our products, everything is hand-made and our quality standards are exceptionally high. For that reason, we guarantee all of our products. If you have any issues with contamination, you will get a replacement.

What's an Injection port?

An Injection port is a self-sealing material. When it’s punctured by the needle it seals itself around the needle while you innoculate. When you withdraw the needle from your inoculation in the injection port it will seal the hole.

This ensures no contaminants can get in and why you can generally inject these with basic sterile working practices. (Gloves etc)

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)

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

  1. Adam Lear

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    Nice size and quick delivery. Have to wait for a while to see how it goes but going by the other product’s looks top notch.

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  2. Nicole

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    Very pleased. Arrived on time and exactly what I need ๐Ÿ˜

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  3. Nathan Scammell

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    Very happy

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  4. Toby W.

    Verified reviewVerified review - view originalExternal link

    Again top product canโ€™t say enough

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