Mushroom Harvest Scorecard: Call the Flush Points, the Hundred Club Medal and Your Grower Rank

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Opens on the book's tub. Enter your own call, your flushes and your Call It results through the season.

Call the Flush: your first flush, called before you harvest

Dry straw in the tub kg

Your call g

Weighed g

The Hundred Club: every flush the tub gave

Every flush g each, commas

The season: your ten Call Its (blank = not played yet) and your Spot the Slips

Ch 1: your call A 1 L jug of dry straw, g

Measured

Ch 2: your call Moisture of a drained sample, %

Measured

Ch 3: your call Spawn your tub needs, g

Measured

Ch 4: your call Dry straw to fill your tub, kg

Measured

Ch 5: your call Minutes to heat a batch to 75 °C

Measured

Ch 6: your call The day your tub is fully white

Measured

Ch 7: your call RH in the closed tub after an hour, %

Measured

Ch 8: your call Your first flush, g

Measured

Ch 9: your call Your second flush, g

Measured

Ch 10: your call 100 g of mushrooms, dried, g

Measured

Spot the Slips found out of 10

Enter your call and your flushes, then press Calculate.

The formula

Call the Flush: the gap = |weighed − call| ÷ weighed; within 5% scores 3 points, 10% 2, 20% 1
The medal: total BE over every flush = all the grams ÷ the dry straw (g) × 100. Bronze 50%, Silver 75%, Gold 100%, the Hundred Club
The season: ten Call Its (3, 2, 1 or 0 points each) + ten Spot the Slips (1 point each) = out of 40
Grower rank: Spore 0 to 9, Spawn 10 to 19, Pin 20 to 29, Flush 30 to 40

The book's worked example, Chapter 11. The book called 900 g and weighed 945 g: a gap of 4.76%, 3 points. The three flushes made 1,455 g from 1,800 g of dry straw: BE 80.83%, Silver, 345 g short of the Hundred Club.

Check it. Score yourself on the tub you grew, not the one in the book: the scale has the last word.

Honest limits. A medal and a rank are a record of one tub and one season, not a grade of the grower. A miss is information: find out why, because that is the chapter. The book's tub, its straw and its harvests were worked out on paper from published figures, not grown by us: weigh your own. Prices are illustrative, as seen in November 2026 (US mid prices, with UK beside where they differ), shown without a currency sign; put in your own. No yield or profit is promised. Everything stays in your browser: no sign-up, nothing stored.