Nutri-Hydro Sterile Rye Grain – Professional Mushroom Spawn Substrate

Premium Organic Rye Grain for Mushroom Cultivation

Our Nutri-Hydro Sterile Rye Grain provides mycologists and mushroom cultivators with professionally prepared spawn substrate, available in 1kg, 2kg, 3kg, and 4kg portions. Each batch uses certified organic UK-grown rye grain, expertly hydrated with added nutrients and sterilised for optimal mycelium colonisation.

Technical Specifications

Each substrate bag features premium Unicorn brand construction with welded self-healing injection ports and 0.2-micron filter patches for maintained sterility. The double heat-sealed design (6mm industrial seals) ensures integrity during storage and transport. Every batch includes autoclave indicator strips and unique identification tags for quality tracking.

Note: Liquid culture or spore syringes sold separately

Preparation Process

Our rye grain undergoes a specialised preparation protocol:

• 24-hour pre-soak in nutrient coffee solution to eliminate endospores
• Thorough washing and rinsing to remove impurities
• Precise 55% moisture content using filtered water
• 8% horticultural gypsum addition for improved grain separation
• Complete sterilisation cycle with batch validation
• Loose grain packing to prevent compression and promote even colonisation

Quality Assurance

• Fresh production 4-5 times weekly
• 30-day sterility guarantee
• Batch-controlled manufacturing processes
• Premium materials sourcing

Applications

Suitable for all cultivation methods including spawn generation, grain-to-grain transfers, bulk substrate inoculation, and monotub cultivation. Compatible with liquid cultures, spore syringes, and agar transfers. One 10ml culture typically inoculates multiple bags efficiently.

Shipping & Storage

Products ship in protective, unbranded packaging via Royal Mail Tracked service. Large orders (25+ bags) require up to 5 business days for fresh preparation. Store in cool, dry conditions until inoculation.

Additional Products

• All-in-One grow bags with integrated substrates
• Sterilised bulk growing mediums
• Coco coir cultivation blocks

Bulk Purchasing

Volume discounts available for commercial cultivators and research facilities. Contact us directly for custom quantities and specialised preparation requirements.