Topics, Regenerative Gardening

How can I best grow mushrooms from dowel plugs and what to consider to succeed ?

Growing mushrooms from dowel plugs can be a rewarding process if you follow the correct steps and considerations. Here’s a detailed guide to help you succeed:

Materials Needed:

  • Dowel plugs inoculated with mushroom spawn
  • Fresh logs (hardwoods like oak, maple, or beech are preferred)
  • Drill with a bit that matches the size of the dowel plugs
  • Hammer or mallet
  • Wax (beeswax or cheese wax)
  • Paintbrush or small applicator
  • Mushroom spawn (specific to the type of mushroom you want to grow)
  • Logs (preferably cut within the last 6 weeks)

Steps to Grow Mushrooms from Dowel Plugs:

  1. Select the Right Logs:
  • Use hardwood logs that are 4 to 6 inches in diameter and 3 to 4 feet long.
  • Freshly cut logs are ideal, as older logs might be contaminated with other fungi.
  1. Drill Holes in the Logs:
  • Drill holes about 1 inch deep and spaced 4 to 6 inches apart in a diamond pattern along the length of the log.
  • Ensure the holes are evenly spaced to promote even colonization.
  1. Insert the Dowel Plugs:
  • Tap the dowel plugs into the drilled holes using a hammer or mallet.
  • Ensure the plugs are flush with the surface of the log.
  1. Seal the Holes:
  • Melt the wax and use a paintbrush or applicator to seal each dowel plug.
  • This prevents contamination and retains moisture within the log.
  1. Incubate the Logs:
  • Place the logs in a shaded, humid environment.
  • Ideal incubation temperatures range from 55°F to 75°F (13°C to 24°C).
  • Logs should be kept off the ground to prevent contamination and ensure proper air circulation. You can stack them in a crisscross pattern or lean them against a structure.
  1. Monitor and Maintain:
  • Check the logs regularly for signs of drying out. If the logs become too dry, you can water them or soak them in water for 24 hours.
  • Protect the logs from pests like insects and rodents.
  1. Harvesting:
  • Mushrooms typically begin to fruit 6 to 18 months after inoculation, depending on the species and environmental conditions.
  • Harvest mushrooms when they are mature but before they start to drop spores. This is usually when the caps are still convex.

Considerations for Success:

  1. Choosing the Right Mushroom Species:
  • Different mushrooms prefer different types of wood. For example, shiitake mushrooms grow well on oak, while oyster mushrooms can grow on a variety of hardwoods.
  • Make sure to use dowel plugs that match the type of wood you have.
  1. Environmental Conditions:
  • Moisture and temperature are crucial for mushroom growth. Logs should be kept moist but not waterlogged.
  • Maintaining the right humidity and temperature is vital during both the incubation and fruiting stages.
  1. Timing:
  • Logs should be inoculated within a few weeks of cutting to ensure they have not been colonized by other fungi.
  • Some mushroom species may take longer to fruit than others, so patience is key.
  1. Pest and Disease Management:
  • Protect your logs from pests and competing fungi by regularly inspecting and maintaining the growing environment.
  • Sealing the dowel plugs with wax helps prevent contamination.

By following these steps and considering these factors, you can successfully grow mushrooms from dowel plugs and enjoy fresh, home-grown mushrooms. For more detailed information, you can refer to guides from trusted sources such as Fungi Perfecti and Mushroom Mountain.


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