Most wine drinkers focus on the obvious variables: grape, region, vintage, even glassware. But there’s another idea that keeps resurfacing: timing.
Not when the wine was made, but when you drink it.
In biodynamic circles, the lunar calendar breaks the year into “fruit,” “flower,” “leaf,” and “root” days, each tied to the moon’s position relative to the zodiac. The claim? Wine doesn’t show the same way every day. A bottle that feels muted one night might taste vibrant and expressive on another, without ever changing the wine itself.
It’s a strange premise, and one science has not confirmed. But it’s persistent. And enough tasters, from casual drinkers to seasoned pros, have noticed patterns to keep the question alive.
So what’s actually going on here?
According to the lunar calendar, fruit days are the most auspicious days to drink wine.
We’ve been testing this theory casually for over a decade. And as science-and-logic-loving geeks, we’ve long been skeptical of the idea.
However, despite our caution, we’ve noticed a pattern of red wine tasting better on fruit days, though it’s not scientifically verified. Additionally, aromatic white wines, like Viognier or Torrontés, tend to show brighter, more lifted aromatics on flower days.
So if you’re about to pop that vintage Bordeaux you’ve been waiting to open for years, here’s what to know before you pull the cork.
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The Lunar Calendar and Wine
Fruit Day vs. Root Day: Rudolf Steiner introduced the framework behind root, fruit, leaf, and flower days in his 1924 lectures on biodynamic agriculture. Long before biodynamics, cultures linked lunar cycles to plant growth, though modern science still hasn’t confirmed any measurable effect on how wine tastes.
Is Today a Fruit Day? You can track these cycles using a biodynamic calendar, which maps the moon’s position through zodiac constellations.
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Root Day
When the moon passes through earth signs (Capricorn, Taurus, Virgo), biodynamic calendars label it a “root day” — generally considered a poor time for tasting wine.
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Flower Day
Flower days are when the moon is in any of the air signs, like Gemini, Libra, and Aquarius. Flower days are recommended for enjoying aromatic wines, such as Viognier or Torrontes.
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Leaf Day
Leaf days are when the moon is in any of the water signs, such as Cancer, Scorpio, and Pisces. They are typically considered less favorable for wine tasting.
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Fruit Day
Fruit days are when the moon passes through zodiac constellations associated with fire signs. Fruit days are the best days for wine tasting.
Who Else Uses the Lunar Calendar?
Lunar planting calendars still influence some gardening and farming practices, especially in biodynamic agriculture. In fact, the Old Farmer’s Almanac uses the very same lunar calendar to recommend planting schedules.
Some proponents argue that because wine evolves over time, it may be sensitive to environmental conditions, including lunar cycles.
Where Biodynamic Farming Gets Weird
We found this image from Backyard Biodynamics to illustrate the fruit/root day theory. If it holds, radishes should perform best on root days.
There’s no solid evidence that the moon changes wine, but the pattern keeps showing up for some tasters, which is enough to keep the question open, and the tasting table interesting.
Learn more about Biodynamic Wine.