Well, I am using roots organic potting soil. Started off with about 2tbs per gallon of medium of 4-4-4 from Down To Earth. Also a little dolomite, kelp, and azomite. I used a spray bottle to water in the beginning. very little in beginning. Then when they were more established I soaked the cups until I saw a few drops coming out the bottom and let completely dry before watering. Every 4-5 days or so. Transplanted after like 33 days (was waiting for another tent to open where I was drying my last harvest) thats where I think it started going wrong. I think they started getting rootbound there. Then when I transplanted into 2 gallon pots, I believe I soaked the pots way too heavy. I had all the signs of overwatering. I soaked it again 3 days later after transplant (problems were not occuring yet) and then the problems happened. I think between that and the nutrients needing some time to get available sent them into some deficiencies. Pretty much the same problems I have had before in veg. I think I am going to start in bigger nursery pots next time and go to 1 gallons instead of 2. Or just start in 1's until they are ready for 5's and flower in 5's
You can use something like Neptune's Harvest, until your dry amendments start breaking down.
With living soil, the bigger the soil volume the better. As the plant gets bigger, it'll consume more, faster than it can be replaced, if your using too small of a volume of soil. I would go to at least 15 gal container.
When watering, just do 5% water to soil. As they get bigger, up it to no more than 10%. Every once in a while, water til you see a tiny bit of runoff. That way you know you have the entire container moist.
Make sure you use ewc with the dry amendments. Maybe some kashi as well. And always use a good layer of mulch.