Shiitake is the classic, meaty gourmet mushroom. There are two beginner paths: the traditional hardwood-log method (slow but low-effort and long-lived) and the faster sawdust-block method indoors. This guide covers both.
Step-by-step
Pick your methodLogs: cut fresh hardwood (oak is ideal) into 1 m lengths in late winter. Blocks: buy or make supplemented hardwood sawdust blocks for a much faster indoor crop.
InoculateLogs: drill holes in a diamond pattern, hammer in shiitake plug spawn, and seal each hole with cheese wax to lock in moisture. Blocks: mix in spawn under clean conditions.
Colonize (the patient part)Logs take 6–18 months to fully colonize — stack them in shade and keep them from drying out. Sawdust blocks colonize indoors in just a few weeks at 20–24°C.
Trigger fruiting with a cold soakShiitake fruits when shocked. Submerge a colonized log or block in cold water for 12–24 hours, then stand it up in humid air with fresh air exchange. Pins appear within days.
Harvest and re-flushHarvest when caps are still slightly curled under. Let logs rest 8–12 weeks, then soak again — a single log can fruit for several years.
Beginner tip: The two mistakes that kill most batches are contamination (skipped pasteurizing) and poor fresh air exchange while fruiting. Get those right and you are most of the way there — see our 7 mistakes guide.
Frequently asked questions
Is it better to grow shiitake on logs or blocks?
Blocks fruit in weeks and suit indoor growers who want a fast first harvest. Logs take many months but then crop for years with almost no maintenance.
How long does shiitake take to grow on logs?
Expect 6–18 months of colonization before the first flush, then years of seasonal harvests after a cold-water soak each cycle.
How do you force shiitake to fruit?
Cold-shock it: soak the colonized log or block in cold water for 12–24 hours, then move it to humid air with good fresh air exchange.
2020 Mushrooms