How frequently should i water plant during different phases and by how much?
Also what is the optimal light schedule for autoflower grow? I was thinking of 18-6
It all depends on your set up and your preference. 18/6 is commonly used for auto throughout the grow.
I see you are growing in soil, so I would water them 1-2 times a week. Make sure your pot is almost dried out before watering. Less is more for soil.
For details check this out: https://www.growweedeasy.com/how-often-water-marijuana
Right now you want to keep her humidity up but not super wet, don’t want the roots to rot..
water when the top is dry, put a clear cup on top will help.
18-6 lighting is good, I have mine on a 20-4 schedule.