Instructions for Small Mushroom Grow Kits

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(For use with all Small Kits — GT, B+, APE, JMF, etc.)

Included in Your Small Grow Kit

  • 1x Fully colonised substrate block (ready to fruit)
  • 1x Filtered grow bag
  • 2x Paper clips for sealing the bag

What You Need

  • Clean water (for misting/soaking if needed)
  • Misting bottle or fine water sprayer
  • Clean working area

Recommended but optional

  • Gloves
  • Face mask
  • Surface disinfectant
  • Thermometer / hygrometer
  • Heating mat (for colder rooms)

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Before You Begin

  1. Prepare a clean space Wipe down the surface where you’ll open and handle the kit.
  2. Wash or disinfect your hands Gloves are helpful but not required.
  3. Avoid drafts Close windows — airflow can carry contaminants.
  4. Do not breathe directly into the grow bag Try not to lean over it when open.

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Starting Your Small Grow Kit

  1. Unpack the kit Remove the grow bag and paper clips. Take the fully colonised substrate block out of the box.
  2. Open the grow bag Place the substrate (still in its tray/tub) inside the bag with the filter patch facing upward.
  3. Fold + clip Fold the top of the bag and secure it loosely with the paper clips. The filter will provide all necessary air exchange.
  4. Provide light + temperature
    • Indirect light (not direct sun)
    • Ideal temperature: 20–24°C
    • Minimum: 18°C
    • If the room is cold, a heating mat on low can help.
  5. Wait for pinning Small pins usually appear within 7–12 days depending on the strain and environment.
  6. Phase 2 — Slightly open the bag Once pins grow into small mushrooms, open the bag slightly to allow gentle evaporation. (Evaporation is a natural trigger for fruiting.)

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Harvesting

Harvest when the veils begin to tear or when you see caps opening.

Use clean hands or gloves; gently twist and pull.

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Second & Third Flushes

Small kits usually produce 2–3 flushes, with the first being the largest.

After each harvest:

  1. Fill the tray/block with clean water.
  2. Soak 8–12 hours.
  3. Drain fully.
  4. Place back into the grow bag and continue as before.

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Side Pins / Mushrooms on the Sides

This is perfectly normal.

If needed, gently tip the cake out onto clean hands, pick the side fruits, and return it to the container before soaking.

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Contamination

If the block turns green, black, red, grey, or yellow, it is contaminated and should be discarded.

Do not attempt to eat anything from a contaminated kit.

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Environment Tips

  • Mushrooms only need ambient light, not direct sunlight.
  • They grow best with fresh air, humidity, and stable temperatures.
  • If no pins appear after 14+ days, check temperature and humidity levels.

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Storage

If you do not start immediately, small kits can be stored in the refrigerator (2–8°C) for up to 2–4 weeks in a sealed bag.

This Kit Is Meant for Small-Scale Home Use