Hi there420luv
Read the Plant, Not the Calendar: Do not feed just because a calendar says to. Wait for the cannabis plant to tell you it is hungry. The definitive first sign of soil nutrient depletion is when the oldest, lowest leaves begin to fade from bright green to a lighter lime-green/yellow.
The "Less is More" Rule: Cannabis growers on forums like r/microgrowery consistently emphasize that starting at ¼ to ½ of the manufacturer's recommended dose is safer. Under-feeding is incredibly easy to fix, while over-feeding causes severe root damage and stunted growth.
Watch Your Water pH: Even though organic soil serves as a natural buffer, always keep your water between 6.2 and 6.8. If your tap water is too alkaline (above 7.5), the plant won't be able to absorb vital minerals like iron or calcium, causing a "lockout" that looks exactly like a nutrient deficiency.