First Flush Only: Why We Stop at the Beginning

A mushroom block doesn't fruit once. Left to its own rhythm, the same substrate will send up several successive flushes: waves of fruiting bodies, each one drawing on what's left of the block's reserves. The first of these is called, unsurprisingly, the first flush. It's also the one we stop at.

The comparison we reach for most often is olive oil. The first pressing of an olive yields the oil with the most character and the least effort extracted from the fruit. Everything after that first press is still oil, still usable, but progressively thinner in what it carries. Mushroom flushes behave in a broadly similar way: the inaugural fruiting draws on a block at its most concentrated, before successive flushes begin pulling from a substrate that has already given up some of what it had.

In our growing rooms in Oswestry, that means every block we tincture is harvested once, at its first fruiting, and no further. The mushrooms from later flushes off the very same blocks don't go to waste: they go to our café bar, and to the chefs we supply, but they don't go into a tincture bottle. That's a deliberate line, and it's one that costs us yield. A grower happy to tincture every flush from a block gets more product from the same square footage of growing room. We'd rather grow more rooms than stretch the ones we have.

Chaga sits slightly outside this logic, because it isn't flushed at all. It's a single, slow-forming conk that spends years accumulating on the trunk of a living silver birch before it's ever cut. Ours is hand-foraged from wild birch in the Scottish Highlands, taken sparingly and never from young trees, which is its own version of the same principle: take only what a season is honestly ready to give, and leave the rest for what comes after.

First flush isn't a claim we can make sound urgent, and we're not trying to. It's a harvesting decision, made quietly, at the point in the growing cycle where a mushroom is most itself, and it's the reason a Shrooma tincture starts with a first flush and nothing else.

Shrooma tinctures are food supplements and are not intended to diagnose, treat, cure or prevent any disease.