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Stage 5 of 6 · Hours per fruit

Harvest timing

Picking each fruit as its veil stretches and tears, before the cap flattens and drops spores.

  1. 1. Inoculation and colonization
  2. 2. Spawn to bulk
  3. 3. Pinning
  4. 4. Fruiting
  5. 5. Harvest timing
  6. 6. Next flush

Signs you're at this stage

  • Caps have stopped being round and closed and are starting to open.
  • A thin membrane under the cap is stretched tight, or has started to tear.
  • Dark purple-black dust is appearing on lower caps or the substrate (you are a little late).

The cue: the partial veil

On a young cubensis fruit, a thin membrane, the partial veil, joins the edge of the cap to the stem and covers the gills. As the cap opens, the veil stretches thin and pale, then tears. The is the classic harvest cue: pick when the veil is just tearing or has just torn, while the cap is still curved downward (Bible, p. 115–116, p. 211). Some growers pick a little earlier, just before the tear, and lose very little size.

Spores start falling just before the veil tears and pick up sharply after (Mushroom Cultivator, p. 4). Forum growers report visible spore drop within roughly four to five hours of the tear on some fruits, and within a day on most. So the tear is the end of the ideal window, not the middle of it.

The window at a glance

Membrane under the cap stretched tight and pale
Tear likely within about 3–12 hours; check twice a day
The veil just torn, cap still curved
Pick now
Cap flat, gills dark
Late; spores are dropping
Cap edges turned up
Very late; expect a coat of dark dust around it
Pick by
Fruit, not flush: ready fruits come off, the rest stay

Why late picking costs you

  • Spores coat the surface and neighbouring caps. The book notes that a heavy spore layer can hold back new pins (Mushroom Cultivator, p. 155).
  • The dark dust hides early mould and makes the surface harder to read.
  • Little size is gained after the tear on normal cubensis fruits, so picking early costs almost nothing.
  • Heavy spore loads irritate the lungs of people who work with them a lot.
  • Missed fruits wither after dropping spores (Bible, p. 118).

Fruits that do not follow the rule

  • Penis Envy type fruits often never tear their veil cleanly. Growers pick these when growth stalls for a day or two and the cap gives slightly when pressed.
  • Albino lines with white veils on white stems make the tear hard to see. Watch the cap shape instead: pick as the cap flattens and its edge starts to lift.
  • Blob mutations such as Enigma have no veil at all. They are cut when a lobe stops growing and softens very slightly.
  • Natalensis-type fruits tear their veil early and keep growing for days, so the tear alone picks them too young. Wait for the cap edge to lift.
  • Some fruits tear while the cap is still tight, especially on very wet cakes. Pair the tear with cap shape.

How to pick

  1. Wear clean gloves wiped with alcohol and allowed to dry (Bible, p. 117–118).
  2. Hold the fruit at its base, twist and lift. For tight clusters, twist the whole cluster or cut it at the surface with a clean blade.
  3. Remove any stub left behind and fill deep holes lightly. Stubs and craters rot and pool water (Bible, p. 211–212).
  4. Take off aborts and tiny dark pins at the same time. Leave healthy white pins that are clearly still growing.
  5. Weigh the flush if you track yields; it tells you how much water to put back.

Whole flush or fruit by fruit

Both work. Picking fruit by fruit gets every mushroom at its best. Some growers find a staggered harvest delays the next flush, and simply clear everything once most fruits are ready, accepting a few slightly early ones. Picking early is never harmful: the mycelium sends its water and food to what is left (Bible, p. 118).

Common mistakes

  • Waiting for the biggest possible fruit and letting the flush drop spores.
  • Pulling fruits out with chunks of substrate, leaving craters that fill with water.
  • Leaving stubs and aborts, which feed mould.
  • Mistaking spore dust for black mould.

What to do next

  • Once the flush is fully picked and the surface cleaned up, see next flush.
  • Purple-black dust everywhere is spore drop, not mould. Pick earlier next time.

Seen something different in your own tub? Add your grow report on the strain you grew. Reports are how these pages get better.

What it looks like

Real photos, credited below each one.

Sources

  1. Psilocybin Mushroom Bible (Haze & Mandrake, 2016), harvest cue and picking, p. 115–118
  2. Psilocybin Mushroom Bible (Haze & Mandrake, 2016), harvesting from bulk tubs, p. 211–212
  3. The Mushroom Cultivator (Stamets & Chilton, 1983), spores begin before the veil tears, p. 4
  4. The Mushroom Cultivator (Stamets & Chilton, 1983), harvest stage and spore cover on the casing, p. 155–156
  5. Shroomery forum: how long after the veil breaks until spores drop
  6. Shroomery forum: veil breaking before the cap opens
  7. Shroomery forum: when to harvest Penis Envy
  8. Shroomery forum: natalensis keeps growing after the veil tears

Written for this site in our own words from the books and threads above. Where growers disagree, both sides are given. Nothing here is advice about anything other than growing.