Gravitational Pull Influences Moisture in the Soil
Moon phase gardening is an idea as old as agriculture, popular in folklore and superstition, but there are scientific ideas to back it up.
The Earth is in a large gravitational field, influenced by both the sun and moon. The tides are highest at the time of the new and the full moon, when sun and moon are lined up with earth. Just as the moon pulls the tides in the oceans, it also pulls upon the subtle bodies of water, causing moisture to rise in the earth, which encourages growth.
The highest amount of moisture is in the soil at this time, and tests have proven that seeds will absorb the most water at the time of the full moon. Planting by the phases of the moon will keep in rhythm with the alternating gravitational pull.
Moon phase gardening considers four phases or quarters lasting about seven days each. The first two quarters are during the waxing or increasing light, from the new moon and growing up to the full moon.