1. DEFAULT PRODUCT LISTING

Our premium and professionally produced sterile rye grain bags are made from 100% organic, UK-sourced rye grain, which has been perfectly hydrated and sterilised, ready for spawn production and bulk mushroom cultivation.

Each bag is packaged in genuine Unicorn-filtered mushroom bags, double-sealed and has an integrated autoclave sterilisation indicator strip and bag batch number*.

We are masters in grain production, having produced and sold over 100,000 sterile grain bags to date, supplying to commercial mushroom farms and hobby cultivators alike. With multiple weekly production runs, we proudly back our product with a 100% Sterility Guarantee for 30 days for your own peace of mind.

Please review the drop-down sections below before placing your order, especially product lead-times if stated.

+ Lead Times

Whilst we often maintain a small inventory of most items for immediate dispatch, often, items that are freshly produced, high-volume, or made-to-order may require additional time before they can be shipped.

This additional time is referred to as the ‘lead time’ or production time. Please consider this when placing your order.

The estimated lead times for this product are listed below:

  • Orders less than 48 units: no lead time
  • 120 units: 1 week

Please contact us if you require larger orders sooner; we may be able to expedite your order for a small fee.

+ Technical Information
  • Full instructions included (link below).
  • Made from certified UK-grown organic grain.
  • Genuine Unicorn Filtered Bags – 0.75kg, 1.2kg & 1.5kg. All with injection ports.
  • Triple-washed to remove chaff, soaked overnight and boiled to a consistent moisture content of 55%.
  • 8% horticultural gypsum is added to help keep grains separated and to add essential minerals and trace elements to support vigorous mycelial growth.
  • Prepared in the same way we make our commercial spawn bags.
  • Bags can be used with all liquid cultures or spore syringes (though the risk of contamination is higher with spore syringes).
  • Suitable for beginners and advanced growers.
  • A liquid culture will need to be purchased separately.
  • Orders of 12 bags or more will most often be supplied without bag tag numbers or sterilisation indicator strips in order to keep prices low for our bulk customers.
  • Note that we cannot refund or replace already inoculated/used bags; please follow the included instructional guide (link also below) so you can self-validate the bag’s sterility before inoculation and ensure a successful grow.
+ Shipping & Returns

FREE SHIPPING AVAILABLE ON ALL ORDERS OVER £50

Orders are typically dispatched on the same or next working day. However, please allow up to 3 working days for dispatch, plus any additional product lead times, especially during busy periods.

We ship our products in plain, unbranded, reinforced cardboard boxes with ample internal protection.

Our shipping couriers may leave parcels with a neighbor or in a safe place if no one is home to receive them. To prevent this, please select the designated signed-for service at checkout and ensure you are available to receive the parcel. Otherwise, the package will be held at your local sorting office or returned to us. Please note that we cannot be held responsible for lost, stolen, or missing parcels if the signed-for service is not chosen at checkout.

Larger orders that require multiple boxes will automatically be upgraded to DPD Local shipping, as they support multi-parcel shipments. Extremely large or heavy orders may need to be dispatched via a pallet.

If items are returned to us due to a failed delivery, a redispatch or restocking fee may apply. Please ensure that any held packages are collected from your local sorting office within 2 weeks to avoid them being returned.

We highly recommend upgrading to the ‘DPD Express Tracked’ service at checkout, as we find it to be the fastest, safest, and most reliable option. Please note that Royal Mail may occasionally experience delays in their sorting offices.

For more details, please refer to our shipping, returns and replacements policy.

+ Quantity Discounts 🔥🔥
Shipping & Returns info | Free Shipping Available Over £90 🚀
⇓ More product information below ⇓

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5-Star Customer Testimonials

Over 2,300 rave reviews and counting! Here's a random selection (different on every page)...

Awesome product. Best I’ve used so far. Very fast delivery and helpful customer service. Also the kids loved the little sweets added to the box. Nice touch.

⭐⭐⭐⭐⭐Kevin Talbot on Google

Delivery, quicker than expected. High quality product as well. Very pleased with the purchase. Many thanks. 😀

⭐⭐⭐⭐⭐Dan Eggleton on Google

Fast delivery, good product, always had successful fruiting with maya. Going to try lions mane next. Meant to be good for preventing dementia and we have never been able to find them when foraging.

⭐⭐⭐⭐⭐Carly Gilmour on Google

Very happy with the products from this store. Purchased on etsy and had a good experience and will definitely come back again

⭐⭐⭐⭐⭐Isaac Antoine on Google

SHIPPING & RETURNS INFO

No fuss Shipping, Returns & Guarantee.

  • We aim to dispatch orders within 2 working days (Monday-Friday)
  • Free shipping option for orders over £50.00 - Shipping Policy
  • No questions asked returns & refunds policy - Returns & Refunds Policy

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