when you think the top half of the soil is dry. lift the container to feel the weight. soak until it drips a couple drops, and then feel the weight of it again. keep track of that.
as the roots grow, youll notice they need more water each time until they start leaking. you gotta read the plants. mine take a soaking every other day. in between i give my young fast growing plants like 4-6 oz just so they have some extra water to grow with, but thats becuase theyre two weeks into bloom and growing hard, i dont need them to search down for water, i just need them to grow and drink at this point.