I add the organicare grow at 8ml/L of base soil (assuming the base soil is already spent). After recycling the soil a few times and blocking off the drainage holes on the pots the soil fertility is rising so I will be adding less. I let it cook for at least a month. This is my current recipe for water only w occasional BS molasses and microbial tea:
Hey Nightbird, I was gonna say 20% worm castings too. Also, it seems to me like you're using too much lime, but I could be wrong. Have you used that much before with good results?