Why Your Grapes Are Changing Colour Right Now
Right now, on the East Bench above Osoyoos, the grapes at Moon Curser Vineyards are turning colour. This year it happened early. Véraison began Monday, July 13, nine days ahead of last year's July 22 start. That's roughly two weeks ahead of a typical vintage at this point in the season. Green berries are going soft and purple, block by block. Most wine drinkers never see this part. It happens in a vineyard, in midsummer, weeks before anyone talks about harvest. But it is the exact moment a grape stops just getting bigger and starts becoming wine.
What véraison actually is
The moment has a name: véraison. Up to that point, a grape's whole job is to grow. It swells with water, holds onto sharp acid, and stays hard and green. Véraison flips the switch. The berry softens. Sugar starts flooding in from the vine's leaves. In red grapes, colour pigment builds up in the skin. That's why a cluster turns from green to a deep, dull purple over a couple of weeks. Acid, which was climbing all spring, starts to drop.
Winemakers usually call it done once half the berries in a cluster have turned. It's a rough, useful marker, more than a precise one. (Confession: before working on this box, we assumed véraison was just a fancy word for "ripe." It's a lot narrower than that. This year, the timing turned out to matter more than most.)
Why nine days matters
A mild winter rolling straight into an early spring is what pushed this year ahead. Once véraison starts, the clock is running toward harvest, so winemakers watch the date closely. It sets the pace for canopy management, irrigation, and eventually the actual picking date.
Timing also depends on the grape. Among Moon Curser's less common varieties is Tempranillo, which tends to turn early and reliably. The team calls it their canary: whichever week Tempranillo shows colour is usually the first real read on how the rest of the season will run. Last year that read came in about a week ahead of a normal vintage. This year it came a week ahead of that. Two early years in a row, stacking into roughly two weeks ahead of typical by mid-July.
A real bench, a real crew
Moon Curser farms the East Bench above Osoyoos, one of the driest, hottest pockets of vineyard land in Canada. The heat that drives all of this has stayed usable most of the season, warm enough to keep ripening on schedule without stalling it. This week, though, the bench is running 37 to 40 degrees. Most of the vineyard is planted to later-ripening reds, so the early start may actually help. It spaces out the white and early-red pick from the long wait still ahead for the late reds.
Winemaker Christian Scagnetti isn't rushing the calendar because of it. Sugar accumulates fast in heat like this, but sugar alone doesn't tell him when to pick. "It's one thing to be sugar ripe," he says, "but if the flavour and phenolic profile hasn't developed to a point where we feel comfortable, I'm more than happy to let sugar get a bit higher to allow the time for the flavours and tannins to mature. The numbers only tell a part of the story. Flavour is something that nature gives us, and it's our job to make sure we pick at the perfect time to create a wholistic experience of a wine."
What this means for the bottle in your box
Moon Curser expects to pick its sparkling grapes around the last week of August this year, with the white table wines coming in shortly after. None of that runs on a schedule that fits neatly into a marketing calendar. It runs because a specific hillside got a specific amount of heat this year. A small crew is reading it week by week, choosing patience over a number on a refractometer.
We think that's worth knowing. Grapes and oak explain part of what's in the glass. The rest of it is a particular July, on a particular bench, that someone paid very close attention to.
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