I am going to surmise that they will do fantastically and probably better than with synthetic nutes. Since the roots and the microbes work together to bring the plant everything it needs, even on its fast time schedule, I bet it is possible to get faster and more efficient delivery of any particular nute that the plant wants, using organic methods, and I am betting that Autos thrive in the organic environment because this system can work around the ppm limitations we have in some synthetic grow methods. I further surmise that other than being a smaller than normal plant which is typically put into a relatively small container, that these plants because of their rapid life cycle, can have larger than normal feeding needs. I am confident the organic feeding cycle will deal with this very efficiently.