Flush

/flʌʃ/ noun growing

A wave of mushrooms that fruit at the same time from one block or tub. Most kits give 2–4 flushes, each smaller than the last.

Illustration: a 5-litre bucket kit with oyster mushrooms fruiting from the holes — fig. 1 — first flush on a 5 L bucket, day 12

In practice

After harvest, the mycelium needs 7–14 days to recover before the next flush. Soaking the block for a few hours ("dunking") restores the water the first flush used up — that's usually what decides whether you get a second flush at all.

Typical share of total yield per flush (oyster kits we tested)