How to Grow Nameko Mushrooms
Step-by-Step Cultivation Guide

Phase 1: Preparation & Opening

Nameko is a top-fruiting species that grows in dense clusters. The goal in this phase is to expose the surface while creating a micro-climate that prevents drying.

• Placement
  Place blocks on shelves with the filter patch facing up.
• The “High Collar” Method
  Cut the top of the bag open, but leave 5-8 cm of plastic standing above the substrate surface.

Why? This plastic collar acts as a humidity shield, protecting the delicate pins from direct airflow while allowing CO2 to escape upwards.

Phase 2: Induction & Pinning

Nameko requires moisture to trigger pinning.

• Surface Moisture
  Unlike other species where you avoid wetting pins, Nameko thrives on moisture.
  Upon opening, mist the top surface of the substrate lightly to ensure it does not dry out.
• Pin Appearance
  Pins will appear as tiny, bright orange “buttons.”
  They develop slowly compared to Oysters.
  Be patient – do not increase temperature to speed them up, as this weakens the stems. 

Phase 3: Development (The “Gelatinous” Phase)

This is the defining stage for Nameko quality.

• Humidity Protocol
  Maintain RH at 95%.
  If the humidity drops below 90%, the signature slime layer on the cap will dry out, causing the caps to look dull and “scaly.”
• The Mucilage Layer
  A healthy Nameko cap should look wet and shiny.
  This is not a sign of spoilage; it is the natural protective barrier of the mushroom.
• Airflow
  Use gentle air circulation.
  Strong drafts will strip the moisture layer faster than the mushroom can replenish it.

Phase 4: Harvest

Nameko clusters are harvested slightly earlier than other species to preserve the “button” shape.

• When to Harvest
  Harvest when the caps are distinct and orange, but the veil underneath the cap is still intact or just breaking.
  Do not wait for the caps to flatten completely.
• Technique
  Grip the entire cluster at the base and twist.
  It is often easier to use a knife to cut the cluster cleanly from the substrate to avoid pulling up chunks of sawdust.
• Post-Harvest
  Nameko has a shorter shelf-life once harvested due to its moisture content. Cool immediately to 2-4°C.

Disclaimer
These instructions are general guidelines for CNC substrates.
Optimal parameters may drastically vary depending on your specific growing facility design and environment.