C
Classy@Home
Very true - normally outdoor soil is a living thing, chock full o' life forms, nutes, minerals, etc. It's depleted in fall after growth, and renews itself with the decaying matter winter and spring.I just don't believe this occurs in a living soil but I do agree with applying only water up to harvest unless you see reason not to.
Indoor - it is what you make it. I grow hydro, so nutes minerals etc are subject to me - but indoor soil can be tended to much like any other medium, and limits placed on what goes in (and out).
Flushing steady w/ plain aqua will still heavily deplete any remaining food for plant, forcing it to make use of its stored energy(s).