You can use this tool to calculate the number of holes you will need to drill in your logs for effective inoculation. This will also tell you how many dowels (plug spawn) you will need. We developed this tool to help our Home Mushroom Cultivation Course students, but anyone is welcome to use it.

We recommend that you use a diamond pattern with the holes approximately 200 mm (8”) apart, and the rows spaced approximately 40 mm (1 1/2 “) around the log.

Enter the average diameter, average length and the quantity of logs that you have to calculate the number of holes you will need to drill and therefore the quantity of dowels or plug spawn you will need.

If you like you can also vary the spacing between the hole in a row and the spacing between rows. If you increase the number of inoculation points your logs will myceliate quicker and will be more likely to produce mushroom in their first season, but this will be at a cost of increased spawn and effort on your part.

If you decrease the number of inoculation points your logs will myceliate slower and may be more prone to failure but you will use less spawn or be able to inoculate more logs.

This tool is provided as part of our: