How to reuse soil?

DonQuixoteNY

New Member
I am using happy frog soil in 1 gallon pots (2 of em) and have about one gallon worth of unused left. I have been using fox farm trio nutrients, my question is.. once I chop my current run can I flush the used soil and just run it again but using the nutrients right from the beginning? or should I mix it with the unused and run it again that way? growing autos outdoors if that matters
 
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