Not in the sense of it being recycled as potting soil.
It's applied in progressively larger pots through the life cycle of a given 'round' of cannabis, then it's typically discarded into small mounds throughout a large-ish spud field, and tilled in, where the soil grows some AWESOME, high-grade, rich, spuds.
*Note: Just visited the former-mothers in bloom, and a couple of them appear to have taken mild offense at the foliar spray with aminos last evening; specifically the GTH#1 and SLH, neither of which like too much N in bloom, or at all. Both show mildly discolored pistils, having briefly(??) departed from the previously snow-white pistils they sported pre-foliar spray.
Likely I'd have been better off sticking to a lighter dose of the Budswell with aminos, and leaving the Fish Hydrolysate behind for that phase.. Or less of both, maybe.
Water alone will do that....