My advice would be to ignore how dry the soil is at the top - it will always dry out first there.. With that size of pot I would suggest every 4-5 days, but LIFT THE POT when you've given them a good soaking, try to remember how heavy it is, then lift it after 3/4 days and see what if feels like - if its light, water. Simple as that.

I wouldn't worry about lower leaf yellowing, as firetheft says, its normal..

MJD
mjdragon Reviewed by mjdragon on . Soil watering question Hey whats up everyone I usually garden in hydro but I'm trying my first soil grow and I had a few questions. First off I'm growing 3 plants in a 4x5x8 area with a 1000w hps in flower. Here is a link of my nutrient usage http://boards.cannabis.com/hydroponics/93676-proven-nutrients-all-you-need-gh-3-part-calmag.html So I water when the top of the soil is very dry is this the right thing to do? Also I had noticed a little yellowing on some leave tips so I flushed with ph'd water for to days. Rating: 5