Man, I'm on my 5th grow now and still question my watering as it is very easy to over water. I was aware of over watering, read all about it and STILL over watered even though I thought I wasnt. Im not alone, see it all the time with new growers.
Underwatering is not good BUT its 100 times better than over watering. When you think its time to water, DONT. Give it one more day. If the leaves start to droop (the plants will let you know) you went a little too far but thats OK. Ive found that cannabis loves a little dry spell and now you know when its dry.
And last but not least, if you want to know for sure without any question.... Weigh your potting soil and pot when its bone dry. Record this number, add water and weigh again. This is a fool proof method that works. It is also helpful because you can see exacty how much water your plant is drinking as these numbers change drastically as the plant matures.
