Well, if you mist the leaves then it must be done in the dark cycle, because the droplets would act as a magnifying glass for the light and burn holes in it.

If you just water the soil around the stem, it doesnt really matter, but i tend to do my waterings in the dark cycle, or a few mins before the lights go off.
LIP Reviewed by LIP on . When to water I just started a plant a few weeks ago and I was wondering if it was better to water during the light hours or the dark, or if it matters at all. I dont think it would matter but just asking. Peace Rating: 5