Description
Organic Rye Grain 25kg Sack – Whole Organic Rye Berries for Grain Spawn
Clean, consistent, bulk rye grain for professional and hobby mycologists.
Our Organic Rye Grain 25kg Sack delivers clean, consistent, organic rye berries ideal for mushroom grain spawn and bulk mycology projects. This 25kg rye grain bag hydrates evenly, shakes well, and supports rapid mycelium colonisation for CVG and coco coir workflows. Perfect for jars or bags, our whole organic rye grain balances moisture retention and airflow, helping cultivators achieve vigorous growth and reliable results.
Whether you’re scaling up or running frequent smaller batches, this bulk organic rye grain 25kg option is the dependable substrate base trusted by mushroom growers across the UK.
🌱 Benefits of Organic Rye Grain
Exact-match bulk: 25kg rye sack for reliable, large-scale mycology projects
Spawn-friendly kernels: Even hydration, easy shaking, rapid colonisation
CVG compatible: Pairs perfectly with coco coir + vermiculite + gypsum for bulk grows
Organic & clean: Whole organic rye berries, consistent quality in every sack
Versatile: Ideal for grain jars, filter bags, monotubs, and bulk trays
🔑 Key Specs of this Rye Sack
Weight: 25 kg
Type: Whole, un-malted organic rye grain (rye berries)
Use: Mushroom grain spawn, CVG/bulk substrate mixes
Allergen: Contains gluten (rye)
Origin/Certification: EU origin, certified organic.
Moisture Content: Typically ~12–14% before hydration (ideal for storage and sterilisation)
Storage: Cool, dry place; reseal or transfer to an airtight container after opening to prevent pests
⚗️ Quick “How-To” – Make Rye Berry Spawn
Hydrate: Soak 12–24 hours, rinse thoroughly.
Simmer: 10 minutes until grains are plump but intact; drain well.
Surface Dry: Spread and allow to reach “dry outside, moist inside.”
Load: Fill jars/bags ⅔ full, fit filter lids or micropore patches.
Sterilise: Pressure cook at 15 PSI for 90 minutes; cool completely.
Inoculate: Under sterile conditions, add spores or liquid culture.
Incubate: Keep at 22–27 °C; shake once at ~30–50% colonisation.
❓ FAQ on Rye Grain
Is this suitable for mushroom grain spawn?
Yes — rye grain is the gold standard for mushroom spawn. Small, firm kernels support fast colonisation and allow clean shaking for redistribution.
What’s the difference between rye berries and rye grain?
They are the same. “Rye berries” is simply another term for whole rye grain.
Does this work with CVG (coco coir, vermiculite, gypsum)?
Absolutely. Use fully colonised rye to inoculate your CVG substrate for bulk grows.
How much does 25kg of rye grain yield in jars/bags?
As a guide, 25 kg fills ~70–85 × 1-litre grain jars (depending on hydration level and headspace).
Is it food grade / certified organic?
Yes, this product is certified organic. Always store in a cool, dry environment to maintain quality.
How should I store a 25kg sack?
Once opened, reseal tightly or transfer to a pest-proof, airtight container. Proper storage extends shelf life and prevents contamination.
🔗“You may also like”
4.5 kg Coco Coir Block – perfect for CVG
Vermiculite – CVG component
Gypsum/Calcium Sulphate – CVG component
90 mm MEA Agar Plates – for clean culture work
GrowBuddie60 Incubator – stable temps for colonisation
Once fully colonised, your rye grain spawn is ready to expand into bulk substrates or fruiting chambers for reliable harvests.
Bulk buy organic rye grain available.
📞 Call 0800 069 9269 for pallet orders or wholesale supply.
