12" Mushroom Log DIY Oyster Mushrooms Ready to Grow Your Own Logs are hand-cut and inoculated with Oyster mushroom spores in visible drill holes that are covered in cheese wax. Grow Your own Oyster Mushrooms At Home Metal plaque on underside of log states date of inoculation, Logs can be stood upright or laid horizontally for growing. Approximately 12L , 4-6 diameter Keep this for yourself or give the best gift anyone could get! The Shiitake Log is the talk of the town! 10% of all sales go to Cluster Busters Research.