The general rule of thumb when watering is to water the plant slowly and stop when you begin to see run off..Then only water agian when the pot is dry.. The best way to tell when that is by checking the weight of the pot when it is wet and dry.. Peace
Double watering is always good practice as well. Apply a few cups to each container, wait 45-60 minutes, then water slowly until runoff. This helps the rootball to distribute the water evenly, avoiding dry pockets.
Make sure that when you water you wet the plant through but the most important thing is wait untill the top 2/3 ince of soil is dry before re~watering this is how to get the best and biggest root mass.Depending on the lights that you are useing the plant should need a max of two feed a week one good one and a top up.But if you feed the plant right wet her through then let dry and repeat it will only need doing once.By letting the plant dry out it will produce far better root structure and this is the only way of getting good yeilds.It can be the best looking plant in the wold but if the roots are over watered it will produce very little.Rmember we want large ammounts of cannabis to smoke not nice plants to look at.