Quote Originally Posted by MegaOctane12
Why? Because Photosynthesis takes place during the day.
OK, so is this relavent some how?

Or are you suggesting that there is no moisture in the soil at night? That can't be it, I must be missing something. Help me out here.

You water plants in soil roughly every 4 to 10 days. The moisture stays in the soil this whole time. Even longer sometimes, especially outdoors. That is unless everything I've ever thought I knew about dirt and moisture is wrong.

People, don't worry. I promise: If you water your plants at night, the dirt will be moist when the lights come on.