Gadenin日本語Get the appThe shape of the cycle
Shiitake does not fit into a single growing season, and that is the first thing to get straight. Wood cut in one dormant season is inoculated a few weeks later, spends six to eighteen months colonising, produces its first mushrooms a year or so after that, and then yields for another three to five years before the wood is used up. Planning is therefore about overlapping cohorts rather than a single annual cycle.
The practical consequence is that you should inoculate a small batch every dormant season rather than one large batch once. A yard with logs at four different ages always has something at fruiting stage, and losing one batch to drought or a competitor does not wipe out your production. Half a dozen logs a year is a manageable amount of work for most households and builds to a steady supply within three years.
Everything below is written by season rather than by date, because the triggers are the state of the trees and the weather rather than a place on the calendar.
| Season | Main task | Judgement point |
|---|---|---|
| Dormant season, leaves off | Cut logs from live hardwood | Buds must not yet be swelling; bark must be tight |
| Two weeks to two months after cutting | Drill, plug and wax the logs | Not the same day as cutting, and not months later |
| Spring | Stack in deep shade off the ground | Choose crib stacking if the site tends to dry |
| Summer of year one | Water the stack in dry spells | Weight and cut-end cracks tell you if it is drying |
| Autumn of year one | Check cut ends for white mycelium | White fans mean the run is progressing |
| Spring to autumn of year two | First natural flushes; begin forcing soaks | Only soak logs that are fully colonised |
| Winter | Leave logs outdoors, sheltered from wind | Freezing is harmless; drying wind is not |
Year one: cut, inoculate, and then leave it alone
The active work of year one occupies two afternoons. The first is cutting: select live hardwood in the dormant season, take logs three to six inches (8 to 15 cm) across and three to four feet (90 to 120 cm) long, and stack them in the shade without scraping the bark. The second, two to four weeks later, is drilling, plugging and waxing the whole batch in one session and getting them into their permanent shaded stack.
- Order spawn before you cut Spawn is ordered by strain and the strain determines the temperature range at which the log fruits. Have it in hand before the wood is cut so that the two-week rest is not stretched into two months waiting for a delivery.
- Cut and rest Fell and buck the logs in the dormant season, then rest them for two to four weeks in deep shade, off the ground and out of the wind.
- Inoculate in one session Drill, plug and wax every log the same day. Label each log with the season and the strain before it goes on the stack.
- Stack and forget Build a crib stack in seventy to eighty percent shade on rails, and from there the only job for the next year is watering during dry spells.
- Start the records Write down the cutting season, wood species, diameter, inoculation date, strain and stack position for each log. This is the year the notes are cheapest to make and the year you will most want them back later.
Year two onward: forcing, resting, harvesting
Somewhere between six and eighteen months after inoculation the logs are colonised enough to fruit. The confirmation is white mycelium spreading across the cut ends. From that point the log is under your control: a twelve to twenty-four hour cold soak brings on a flush within about a week, and after picking, the log rests six to ten weeks before you soak it again.
Through the warm months, aim for a soak every couple of months per log, staggered across the stack so that two or three logs are always coming into flush rather than the whole yard at once. Natural flushes arrive after heavy rain and after a sharp autumn temperature drop, so watch the weather and skip a planned soak if nature has already triggered one. Fruiting slows or stops in the coldest and hottest parts of the year; in a hot summer, expect little from the logs between the early summer flush and the first cool nights of autumn.
Through winter, leave the logs outdoors in their stack. Cold does not harm a colonised log and a freeze-thaw cycle appears to help the following season's flushes. The only winter hazard is desiccating wind, so keep the stack sheltered.
Do not soak a log that has not yet shown white mycelium on its cut ends. Forcing a log too early in the spawn run wastes the soak, waterlogs the wood and delays colonisation. If nothing shows on the cut ends, the answer is another season of waiting.
Years four to six: retiring logs and keeping the cycle going
A log gives its heaviest yields in years two and three, holds steady in year four, and then tails off. The signs of a spent log are unmistakable once you have seen them: the wood feels light even after a full soak, the bark loosens and lifts, the cut ends go soft and punky, and a proper soak after a proper rest produces only a few undersized caps. At that point break the log up and put it under a hedge to finish rotting, or use the pieces to edge a bed.
Because logs retire on a rolling basis, the yard should always contain a spread of ages: this year's freshly inoculated batch, last year's batch coming to the end of its spawn run, and two or three older batches in full production. Inoculating a small batch every dormant season keeps that spread automatically without any single year of heavy work.
Your own records are what turn this from guesswork into a system. Once you have three or four years of soak dates and yields written down, you will know how long your climate really takes to colonise a log, how many weeks of rest your logs actually need, and at what age your wood gives up. Those numbers are specific to your site and nobody else's notes will supply them.