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Uncle Myc's 2lb sterilized rye berry mushroom spawn bag with logo.
Uncle Myc's sterilized rye berry grain mushroom spawn bag with cartoon mascot.
Uncle Myc's 2lb sterilized rye berry mushroom spawn bag with logo.
Uncle Myc's sterilized rye berry grain mushroom spawn bag with cartoon mascot.
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Uncle Myc's Rye Berry Grain 100% Sterilized Mushroom Spawn Bag

Official Uncle Myc's Dealer Model: UN-RYE2
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  • Available in 2lb and 4lb bag capacities for scaling small or large operations
  • Includes self-healing injection port and filter patch for sterile gas exchange
  • Pre-hydrated rye berries optimized for consistent moisture levels and colonization
  • View More Details

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VOLUME PRICING

Commercial & Bulk Purchasing

We support operations & licensed facilities with volume pricing, dedicated account managers, and custom equipment consultation.

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THROUGH THE Cultivator's LENS Hands-On Evaluation

  • You are starting your first cultivation run because you need a clean, consistent base that eliminates early-stage failure
  • You are scaling up your operation because you need a standardized grain substrate that performs reliably across every bag

  • The larger grain size holds up better during the break-and-shake process than smaller, finer particles
  • Professional sterilization beats home-prepared methods by removing competing organisms before they even enter your lab

  • Growers who moved from manual prep to these bags say they spent significantly less time troubleshooting contamination
  • Operators who run both sizes say the consistency between the 2lb and 4lb units makes planning their bulk transfers easy

Uncle Myc's Rye Berry Grain 100% Sterilized Mushroom Spawn Bag

A weak or contaminated spawn bag sets back an entire grow before it even starts, which is why the quality of your starting grain matters more than most cultivators realize. Uncle Myc's Rye Berry Grain 100% Sterilized Mushroom Spawn Bag gives both beginners and seasoned growers a reliable foundation, using rye berries carefully sourced and hydrated to the ideal moisture level for superior, consistent colonization.

Every bag is professionally sterilized rather than pasteurized, eliminating competing organisms before it reaches you and creating genuinely optimal conditions for mycelial growth from the moment you inoculate. Rye's larger grain size and dense nutrient content make it a versatile choice, well-suited to a wide range of gourmet and medicinal mushroom species.

Once colonized, rye's sturdy structure holds together well during break-and-shake steps, giving you an even, high-vigor spawn that's easy to work with when it's time to transfer to bulk substrate. Available in 2lb and 4lb sizes, it scales cleanly from a single grow to larger multi-bag operations without any drop in quality or consistency.

Features

🔬
Pre-Sterilized and Ready to Use

Professionally prepared to eliminate contaminants and ensure optimal growth conditions.

🌾
High-Quality Rye Grain

Carefully sourced and hydrated to the ideal moisture level for superior colonization.

💉
Self-Healing Injection Port

Simplifies inoculation with spores or liquid culture while maintaining a sterile environment.

🌬️
Filter Patch Included

Allows for proper gas exchange while keeping outside contaminants out of the bag.

🍄
Versatile Use

Perfect for cultivating a wide variety of gourmet and medicinal mushroom species.

⚖️
Two Sizes Available

Choose the 2lb bag for smaller grows or the 4lb bag for larger-scale cultivation.

Frequently Asked Questions

Why choose rye berries over other grain spawns? +

Rye berries offer a dense nutrient content and a sturdy structure that holds up well during break-and-shake steps. This makes them a reliable, versatile choice for a wide range of mushroom species.

How do I inoculate the bag? +

Use a syringe to inject spores or liquid culture through the self-healing injection port. The port reseals itself afterward, keeping the bag sterile throughout colonization.

How is contamination prevented during colonization? +

Each bag is professionally sterilized before shipping, and the integrated filter patch maintains proper gas exchange throughout colonization while keeping contaminants out.

Do I need to hydrate or prepare the grain myself? +

No. The rye grain arrives hydrated to the ideal moisture level and ready for inoculation, so there's no soaking or preparation needed before you get started.

Which size should I choose — 2lb or 4lb? +

The 2lb bag suits smaller grows or first-time cultivators testing a new strain, while the 4lb bag works well for growers scaling up spawn production for larger bulk substrate batches.

Is this spawn bag suitable for beginners? +

Yes. Since the grain arrives pre-sterilized and hydrated, beginners can move straight from inoculation to colonization without needing extra equipment or grain prep experience.

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Questions About This Product?

Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)

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