Troubleshooting Solutions

Diagnosing Your Grow

Every cultivator faces challenges. The key to success is early detection and correct intervention. This guide covers the most common biological and physiological issues you might encounter.

1. Contamination (The Green Monster & Friends)

Contamination is the presence of unwanted organisms. Once visible, it's often too late to save the infected area, but you can sometimes save the rest.

Trichoderma (Green Mold)

• Appearance: Starts as bright white, dense mycelium, then turns emerald green as it sporulates.
• Cause: Unsterile grain, pasteurization failure, high pH, or poor air quality.
• Solution:
  • Do not open inside! Spores will spread everywhere.
  • If it's a small spot on a large cake, you can try to cut it out (salt the edges), but success is rare.
  • Best practice: Toss the entire cake/tub immediately.

Cobweb Mold (Dactylium)

• Appearance: Grayish, wispy, very fast-growing aerial mycelium. Looks like a cobweb.
• Test: Spray with hydrogen peroxide. If it melts/disappears instantly, it's cobweb. Cubensis mycelium won't melt.
• Solution: Spray lightly with 3% hydrogen peroxide. Improve air exchange.

Bacterial Blotch (Pseudomonas)

• Appearance: Yellow to brown lesions on mushroom caps. Caps may feel slimy.
• Cause: High humidity + water droplets sitting on caps + poor airflow.
• Solution: Increase FAE immediately. Stop misting directly on fruits. Harvest affected fruits (safe to eat if cooked/dried, but texture may be poor).

2. Growth Stalling

When the mycelium stops growing or mushrooms stop developing.

Stalled Colonization (Jars/Bags)

• Cause 1: Bacterial Contamination. Look for "wet spots" or uncolonized grains pressed against the glass. Fix: Shake the jar to redistribute (if grain). If it doesn't recover, toss it.
• Cause 2: Low Temperature. Fix: Warm up the area to 75-80°F.
• Cause 3: Lack of Gas Exchange. Fix: Loosen the lid slightly or ensure filter patch isn't blocked.

Stalled Fruiting (Abortions)

Aborts are primordia that stop growing and turn black/dark blue.

• Cause: sudden environmental shock (dryness, cold snap) or the substrate running out of resources.
• Solution: Pick them! They are potent but will rot if left. Check your humidity and temp stability.

3. Strange Mycelium Behaviors

Overlay (Stroma)

• Appearance: Thick, rubbery, dense mat of mycelium on the surface that won't fruit.
• Cause: Genetics, or prolonged vegetative growth due to low FAE/high CO2.
• Solution: "Fork Tek" - sterilize a fork and gently scrape the surface to break the mat. Increase FAE and misting to stimulate pinning.

Aerial Mycelium

• Appearance: Mycelium reaching up into the air.
• Cause: High humidity and lack of fresh air.
• Solution: Increase FAE. It's not harmful, just an indicator.

4. Mushroom Deformities

Mutations (Blobs, Enigma, Rosecomb)

• Rosecomb: Gills growing on top of the cap. Cause: Contact with petroleum products (Lysol, cleaning fumes). Fix: Stop using chemical sprays near the tub.
• Blobs: Common in Penis Envy first flushes. Fix: Normal genetic quirk. Safe to eat and very potent.

Hollow Stems

• Cause: Often genetic or high temperature/rapid growth.
• Fix: Lower temperature slightly. Generally not a problem, just less weight.

Decision Matrix: Toss or Save?