A Biodynamic and Lunar Calendar for Wine Lovers

For wine enthusiasts seeking a deeper connection with nature, biodynamic agriculture offers an intriguing approach. This practice, working in harmony with cosmic rhythms, is a cornerstone for many grape growers and natural winemakers. While the scientific debate on lunar and stellar influence on the biosphere is ongoing, they refer respectfully to the lunar calendar, just as our ancestors did for centuries across various cultures.

The underlying principle is simple, the Moon’s gravitational pull, the primary force behind the Earth’s tides, is believed to affect the biological rhythms of everything living on the planet.

The lunar calendar, incorporating the moon’s phases and its transit through star constellations, guides each step in biodynamic agriculture. This premise, outlined by Rudolf Steiner in the 1920s and further elaborated by Maria Thun in the 1960s, lays the foundation for modern biodynamic agriculture.

For low-intervention winemakers working with spontaneous fermentation and zero additives, aligning vineyard and cellar tasks with these phases is a way to achieve clarity, stability, and energy in the wine without going for chemical shortcuts or corrections.

This calendar guides activities in the vineyard and cellar throughout the year. Here are a few examples of how it looks in practice:

• 🌑 The New Moon: Rest and Reflection During the New Moon, the lunar gravitational pull is minimal, and the moon’s light is absent. The energy of the vine is directed entirely downward into the root system.
  • In the Vineyard: Sap flow is at its lowest. This is the ideal time for winter pruning, as the vines will not “bleed” sap from the fresh cuts, protecting them from disease.
  • In the Cellar: Microbial activity is quiet. It is a period of rest, making it a good time to leave the fermenting juice alone to stabilize naturally.
• 🌓 The Waxing Moon (Ascending): Upward Energy As the moon grows from New to Full, its gravitational pull increases, and moonlight intensifies. The vine breathes “out,” drawing water and nutrients up from the soil into the stems and leaves.
  • In the Vineyard: The rising sap promotes rapid vegetative growth. This is the time for grafting or planting new vines, as they will push upward with vigor.
  • In the Cellar: The wild yeast populations and native microbes become highly active. Spontaneous fermentations often kickstart or accelerate during this phase.
• 🌕 The Full Moon: Peak Vitality The Full Moon represents the peak of cosmic energy and the strongest gravitational pull. Moisture is pulled closest to the surface of the earth and the outer extremities of the plant.
  • In the Vineyard: The vine is flush with water. Biodynamic growers often avoid harvesting directly on a Full Moon if they want highly concentrated flavors, as the grapes are slightly more swollen with water.
  • In the Cellar: Wines feel expansive, lively, and sometimes a bit restless.
• 🌗 The Waning Moon (Descending): Drawing Inward As the moon shrinks back to darkness, the vine breathes “in.” Energy and sap retreat from the canopy and move back down toward the earth.
  • In the Vineyard: This is the perfect time for working the soil, applying biodynamic compost, and allowing the roots to absorb nutrients.
  • In the Cellar: This phase is critical for natural winemaking. The descending gravitational pull draws suspended solids and yeast cells downward to the bottom of the vat or barrel. For instance, waiting for a Waning Gibbous moon in a fire sign like Sagittarius is a classic biodynamic sweet spot for bottling—it encourages both physical clarity and vibrant aromatic expression, eliminating the need for heavy mechanical filtration.

This rhythm also applies to wine tasting:

• 🔥 Fruit Days: Wines display their best profile. They are generally more expressive, showcasing their full range of aromas and flavors. These are the ideal days for wine tasting events or enjoying a special bottle.
• 💨 Flower Days: Wines tend to highlight their more delicate and floral notes, making these days perfect for appreciating the nuances of aromatic white wines or elegant reds.
• 💧 Leaf Days: These days might bring out more vegetal and herbaceous qualities in the wine, which can be intriguing but might not be the best time to open your finest bottles.
• 🪨 Root Days: Often result in wines faring poorly, with high tannin and muddy, earthy notes. Generally considered the least favorable for tasting, wines may seem subdued and less expressive.
• ⚠️ Node Days: Points where the Moon’s path crosses the Earth’s orbit around the Sun. This crossing creates chaotic energy. On these days, the wines tend to be muted or closed.

To see this in action, check out the interactive calendar at the bottom of this page to find out exactly what kind of cosmic energy is interacting with your wine in coming days.

By the way, going lunar with supermarket wines from Gall & Gall, Albert Heijn, or Grapedistrict won’t make any difference; those wines are already dead, killed by loads of sulfur, diammonium phosphate, dimethyl dicarbonate, and other artificial additives, and nothing can bring them back to life.

To make a proper case study, visit your local natural wine dealer, get a few bottles, preferably crafted by a winemaker practicing biodynamics, and start a voyage.

Go boldly where no one has gone before!