Planting right AFTER a full moon is a good idea because during full moons the weather typically get's colder. So in the spring, your last frost will probably be on a full moon. If you look at your moon schedule and your average last frost days, the full moon during that time is a pretty good bet for your last frost. Planting right after that moon will give you a good chance of maximizing outdoor grow days without freezing the babies. As far as harvesting on a full moon... no idea!