How to Grow Pink Oyster Mushrooms
Climate & Fruiting Guide

Phase 1: Preparation & Opening

Pink Oysters are side-fruiting mushrooms that produce large, shelf-like clusters.
Unlike top-fruiting species, the goal here is to focus the energy of the aggressive mycelium into specific points on the side of the block.

• Placement
  Place blocks on shelves horizontally or vertically.
• The “X-Cut” Method
  Do not open the top of the bag.
  Instead, fold the excess plastic at the top down tightly against the block and tape it in place to remove air pockets.
  Cut 2 to 4 small “X” slits (approx. 3-5 cm) on the vertical sides of the bag.

Why? This concentrates the biological pressure at the slits, forcing the mushroom to form dense, heavy clusters rather than many small, spindly ones.
Removing air pockets between the plastic and the substrate prevents “pinning under the plastic.”

Phase 2: Induction & Pinning

Pink Oysters require warmth and high humidity to “wake up” their tropical genetics.

• Tropical Climate
  Maintain a warm fruiting room. Pink Oysters perform best between 20°C and 30°C.
  If the room is too cold (below 15°C), growth will stall and the color may turn muddy.
• Humidity
  Maintain RH at 90–95% during the first 48 hours after cutting.
  You will see tiny pink “pins” emerging from the slits within 2–4 days.
• Visual Check
  Healthy pins should look like a cluster of bright, saturated pink coral.
  If the pins look pale or white, increase the light intensity immediately.

Phase 3: Development (The “Oxygen” Phase)

The Pink Oyster is an “Oxygen Glutton.” It has one of the highest metabolic rates of any cultivated mushroom.

• CO₂ Management
  This is the most critical factor. Maintain CO₂ levels below 800 ppm.
  If CO₂ is too high, the mushrooms will develop long, ropey stems and tiny, useless caps.
• Airflow
  High evaporation is key.
  You need a constant, gentle exchange of fresh air to strip away the CO₂ produced by the block.
• Light for Color
  Pink Oysters require light to synthesize their pigment.
  Provide 1000–1500 lux of “cool white” light for 12 hours a day.
  Without sufficient light, the “Tropical Coral” will fade to a pale white.
  
• Air Temperature
  20-25°C

Phase 4: Harvest

Because of their rapid growth, the window for a perfect Pink Oyster harvest is very short—often only a few hours.

• When to Harvest
  Harvest when the edges of the caps are still slightly curled downward or have just flattened out.
  If the edges begin to curl upward and release white spores, the mushroom will lose its color and shelf life rapidly.
• Technique
  Grip the entire cluster at the base and pull firmly, or use a sharp knife to cut the base flush with the plastic.
• Handling & Storage
  Pink Oysters are more fragile and have a higher water content than Shiitake.
  Handle clusters with care to avoid bruising.
  Place them in the cold chain (2–4°C) immediately.

Shelf Life Note: Due to their tropical nature, Pink Oysters are best sold shortly after harvest.

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