Enoki

Flammulina velutipes grows long white stems only if it is cold and high in carbon dioxide. In the warmth it is a different mushroom, golden and short.

Two faces of the same mycelium

The white tray enoki, with fifteen-centimetre stems and almost no caps, is not a different species from the golden enoki that comes out of logs in winter. It is Flammulina velutipes kept cold, nearly in the dark, in a bottle neck or a tight bag where carbon dioxide stays high. In those conditions the stem lengthens in search of air and the cap does not open. If the same block sits in a room at 18 °C with new air, it makes a short, velvety, orange-brown mushroom with a real cap. Both are enoki. The white one is not purer. It is more suffocated, on purpose.

Understanding this avoids the main disappointment: you inoculate, you wait, you open it like an oyster, and you get golden mushrooms that look wrong to you. They are not wrong. You did not give them the cold.

Enoki liquid culture is the seed. The word “golden” on the bottle does not oblige you to the short mushroom. It names the species. You decide the form afterwards, with temperature.

Coltura Liquida Flammulina Velutipes 10ml • Enoki Dorato€7,83

Grain and wood, then the cold

The path to the block is ordinary: a few millilitres onto sterilised rye, a break at one third, spawn into beech or master mix. Enoki colonises a sawdust substrate well, around 20 °C. It is not the slowest in the catalogue and it is not an oyster. Two or three weeks on grain is normal. The white is fine.

Sterilised beech stays closed until it is taken. Then, if you want the golden mushroom, a slit, humidity, air, and a cool room. If you want the long white one, you do not open everything. You leave a narrow neck, like a bottle’s, and you move the block into the cold.

Substrato Funghi Faggio Sterilizzato — 1 kg / 2 kg€12,90

The useful cold sits around 8–12 °C, not in the freezer and not at a fixed 4 °C if the pins will not start. Many people wait until primordia peek at a moderate temperature, in a closed space, and only then cool the block, so the stems stretch. A household fridge can serve if it is not an icebox and if the block does not dry out: a loose, unsealed bag holds humidity. A fridge blows and dries. Without a little shelter the long white form does not arrive. Sticks do.

Harvest the stems when they have the height you want and before the little caps open and brown. Cut the tuft. A second flush is possible. It is not the kilo on the poster.

The golden one, which is the real fungus

In air and in the cool, not in frost, Flammulina makes slimy orange caps on dark, velvety stems. It is a winter fungus. In nature it comes late, when the others have stopped, and that is a clue: the heat of a summer kitchen lets it colonise and then discourages it from fruiting. If it is July, keep the culture in the fridge and wait. Forcing pins at 24 °C produces aborts.

Eat it cooked. The slime of the golden cap is normal, as with nameko, and it disappears in the pan. It is not a sign of quality above or below the white form. It is the same species without the bottle-neck trick.

An enoki plate is for seeing a clear, regular mycelium before the grain. An orange sector on the plate is not “the colour of the mushroom”. The mushroom’s colour is in the cap. On the plate, orange is often another guest.

Piastra Petri Enoki (Flammulina velutipes) – Fase Iniziale€19,90

Typical mistakes

Looking for the long white form in a bag thrown wide open. Putting the block in the freezer. Judging a handsome golden one a failure because it does not look like the tray. Spraying the white stems until they collapse: they are already at the edge of humidity, and free water knocks them down. Using straw and wondering why the tuft is mean. Swapped labels: some bottles on the market confuse the names. If the mycelium runs like an oyster and fruits at 20 °C in shelves, it was not enoki.

There is no promise of perfect stems the first time. There is a mechanism: cold, a narrow neck, humidity without a puddle, little light. Remove one of these and you are back to the golden mushroom, which is still a kitchen mushroom, not a mistake to throw away.

The neck, in practice

The long white form is not born of a magic fridge. It is born of a gradient. At the bottom the block is moist and rich in carbon dioxide. At the top, beyond the neck, there is cooler air and a little light. Stems grow toward that difference. If the neck is as wide as the block, there is no difference and the caps open. If the neck is a millimetre hole, the stems crush and rot in still humidity. A neck of two or three centimetres, on a jar or a rolled bag, is a sensible starting point. You adjust by looking: stems that open into golden caps want a tighter neck or more cold; stems that stay as wet threads and collapse want more exchange.

Light, for the white form, is little. Enough not to be a dark cupboard, not enough to colour the caps. For the golden form it is the opposite: indirect room light, so the cap takes on orange. Putting the jar on the windowsill in February, low sun, is already too much for the white form and can suit the golden one if the glass is not acting as a lens.

Grain, before any of this, is read like the others. Fine white, a mushroom smell, no liquid at the bottom. Enoki on rye that is too wet makes a sparse mycelium and then bacteria, and you blame the cold for a failure that happened at room temperature three weeks earlier. The date on the label is for this: so you do not mix up the times.

When you cut the tuft, cut high enough not to dig into the block, and low enough not to leave a stump of stems rotting in the neck. That stump is the most common cause of a second flush that smells. The block rests a few days, still cool, and may make points again. If it does not, soaking it is not a duty. Soaked enoki becomes a sour sponge faster than an oyster.

In summer the liquid culture stays in the fridge and the project waits. Colonising in July to have white stems in August is possible only if you truly have a place at 10 °C that is not the freezer compartment. Without that place, grow the golden form in autumn, or do not grow it. Forcing the species against the season teaches little and wastes rice, grain and patience.