Gardening by the moon is not new, it's based on science as well as the stories of folklore and superstition.
The Earth is impacted by both the sun and moon. The tides are influenced by moon 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.
But in a few days we will have the new moon where the lunar gravity pulls water up, and assists the seeds to grow.
With the increasing moonlight there's a balanced root and leaf growth. This is the best time for planting above ground annual crops that produce their seeds outside the fruit. Lettuce, spinach, celery, broccoli, cabbage, cauliflower, and grain crops. Cucumbers like this phase also, even though they are an exception.