Lunar calendar for cannabis in 2025

Growing cannabis seeds in open or closed soil can be done according to the lunar calendar. While sunlight is crucial for plant growth, the other half of the day — the night, when the Moon appears in the sky — is often overlooked. Using the lunar calendar for cannabis can significantly increase yield and improve the quality of your home harvest.

In this article, we will review the key terms and aspects that will help you effectively use the lunar calendar for cannabis cultivation.

The Moon: Key Terms

Before exploring how the Moon affects your cannabis garden, it's important to understand some basic terms. These include lunar cycles and phases, tidal effects, and zodiac constellations, which play a significant role in lunar-based cultivation.

Lunar Cycles and Phases

The first question that may arise is: “How does the Moon impact cannabis growth?” Lunar cycles are related to changes in the distance between the Moon and Earth, observed as the rising and descending Moon. This movement determines the distribution of moisture in plants: depending on the cycle phase, moisture rises or descends.

Lunar phases (not to be confused with cycles) represent the changes in the Moon's visible shape over 28 days. These phases reflect how the Sun illuminates the Moon, from complete darkness to full light. Like cycles, lunar phases also affect plant growth.

Besides changes in illumination, the Moon exerts a gravitational effect on Earth's tides. High tides occur when the Moon is closer to Earth, and low tides when it's farther away. Considering tidal changes during cannabis cultivation is essential.

Zodiac Constellations

As the Moon passes through zodiac constellations, it influences plants. It is believed that the energy of each constellation affects the plant parts associated with that sign. Planting during the corresponding period can greatly enhance results.

Growing Cannabis Using the Lunar Calendar

Now that the basic concepts are covered, let’s explore how lunar cycles and phases affect cannabis growth. Accounting for lunar phases, tides, and stars can significantly improve harvest quality.

Growing by Lunar Cycles

You can identify the rising or descending Moon by observing the sky at the same time each night. The next day, you’ll notice whether the Moon is higher or lower. Keep in mind that these cycles differ between the Northern and Southern Hemispheres.

Rising Moon

During a rising Moon, liquids move to the upper parts of plants. This is a great time for taking cuttings but not for harvesting due to increased moisture in the buds.

Descending Moon

During a descending Moon, liquids flow downward, promoting active root growth. This is the ideal period for sowing seeds, root care, and soil enrichment. It’s also the perfect time for harvesting.

Growing by Lunar Phases

Lunar phases include: new moon, waxing moon, full moon, and waning moon.

New Moon

During the new moon, when the Moon is completely hidden, it’s better to avoid active gardening. Light pruning or removing damaged leaves is the most that should be done.

Waxing Moon

During the waxing moon phase, plant sap moves upward, strengthening plants' resistance. Pruning is not recommended during this time.

Full Moon

At the full moon, plants are especially rich in moisture. This phase is not ideal for pruning but perfect for seed germination.

Waning Moon

During the waning moon, sap moves downward, making this the best time for harvesting as moisture levels in flowers are minimal.

Influence of Tides on Cannabis Growth

Tides caused by the Moon complement lunar cycles and phases. Considering their dynamics helps achieve better results.

High Tide

High tide is the ideal time for cutting and composting. It’s also suitable for harvesting if it coincides with a waning Moon.

Low Tide

During low tide, sowing seeds is most effective, especially if the Moon is in a waxing phase. This is also a good time for soil fertilization.

Cannabis: The Moon and Zodiac

As the Moon moves through zodiac constellations, the elements of these signs influence different parts of the plant.

• Fire Signs (Aries, Leo, Sagittarius): stimulate seed germination.
• Air Signs (Gemini, Libra, Aquarius): promote flowering.
• Water Signs (Cancer, Scorpio, Pisces): accelerate greenery growth.
• Earth Signs (Taurus, Virgo, Capricorn): support root development.

Conclusion

Growing cannabis by the lunar calendar, tides, and zodiac constellations contributes to achieving outstanding results.

• Rising Moon: cutting.
• Descending Moon: seed germination, soil care, harvesting.
• New Moon: light pruning.
• Waxing Moon: fertilization, transplanting.
• Full Moon: seed germination.
• Waning Moon: harvesting, root care.
• High Tide: harvesting (with a waning Moon).
• Low Tide: seed sowing (with a rising Moon).