I totally get what you mean about the moon cycles. On overgrow there was someone that would regularly post threads to update people about the moon cycle - for best times to germinate, clone, etc. It's all that "farmers almanac" type stuff and you'll find that they'll all have conflicting times of when to do stuff with your plants. The moon's gravity has a definite impact on things here on Earth, but to what degree that it makes a difference how our plants are grown? I have no clue! The differences in growing a few plants in accordance with the moon cycles are probably miniscule, so I wouldn't worry about it.