Inoculate Logs
Use your spent block to inoculate hardwood logs and you get mushrooms for years. Literal years. Some growers are still harvesting two years later from logs they started with their first ShroomBag.
- 01
Start with fresh hardwood
Oak is excellent. Maple works. Use logs before they dry out, ideally within a few weeks of being cut.
- 02
Drill a pattern of holes
Space holes around and along the log, roughly 6 inches apart in rows around the circumference.
- 03
Pack the holes
Press broken-up colonized substrate from your spent block firmly into each hole.
- 04
Seal with melted wax
Brush hot wax over every hole to lock in moisture and keep contaminants out.
- 05
Stack and wait
Set the logs in a shaded, humid spot. Colonization takes months, often most of a year, before the log fruits.
- 06
Trigger flushes with water
Once colonized, logs fruit in waves, often after rain or a long soak in a tub.
Patience is the price. The reward is mushrooms that show up on their own out in your yard, season after season, for years, from a few logs you set up once.
Nothing here requires buying anything. But if you want more material to expand from, a fresh kit or refill is the fastest way to stack another cycle on top of this one.

