"Corn planted under a waning Moon grows slower but yields larger ears."

Garden Guide: Outdoor Planting Table - The Old Farmer's Almanac -
"The best time to plant flowers and vegetables that bear crops above ground is during the light of the Moon; that is, from the day the Moon is new to the day it is full. Flowering bulbs and vegetables that bear crops below ground should be planted during the dark of the Moon; that is, from the day after it is full to the day before it is new again. The Moon Favorable column below gives these days, which are based on the Moon's phases for 2008 and the safe periods for planting in areas that receive frost. See Moon phases for the exact days of the new and full Moons."