Thanks. It's always that thing that you didn't think about that bites you, and I'm sure there are a hundred other things I haven't thought about (That's why I made the post). I'm sure the potting mixes aren't sterile, so that generates numerous questions: How to sterilize the soil? - How does sterile soil change fertilization requirements? - etc. etc.
However, don't you have the same potential issue with bacteria/fungi as the soil naturally heats to those same temperatures during the course of the year? Other than being warmer longer (which it is already in those areas with longer growing seasons), how is what I'm proposing adding to that risk? (as long as I don't heat the soil to levels beyond what it naturally reaches)?
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