First Grow, White Widow

Watching the time lapse shows me how my plants are doing throughout the day. Unfortunately, I am only setup to download the data once a week after the grow has already happened. I noticed on the one from week 5 that there would be times it would show growth, and then later in the day start to droop. I figured this might have to do with my watering schedule, I did not want to over water, so I only did it every 2 days. Then I bumped it up to 1.5 days, but now I am watering every morning and that seems to have helped a bit after watching this weeks video. Next week should show better results I hope. So far each time I check them they seem to be doing well. I would like them a little taller, but I can't complain on how they are doing. I upped the nutes a bit this week as well. Do you think I should water more than once a day? When is the best time to water, just before they start daytime or just before they hit nighttime? Or somewhere in between?