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The Soil Science Society of America has a nice reference page that you might find helpful. Somewhat surprising to me was that their advice for small-scale contaminated sites was, essentially, to do nothing. Here's a quote: Many petroleum hydrocarbons are naturally-occurring compounds, as they are harvested from the earth. Of course, many are also further ...


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Even though you asked about Vermiculite/Perlite, You might want to consider using Biochar instead of perlite. While it's more expensive, it has numerous benefits over perlite. It's renewable It retains more water than perlite (supposedly 1.6 times more - https://char-grow.com/biochar-impact-nutrient-water-retention) The process to make it is actually carbon ...


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Most seeds will do just fine in potting soil. That's usually the cheapest and easiest way to go, just fresh potting soil. You may even mix a little bit (5-10%) of perlite through it but it is not necessary. I sometimes do it just because I have it anyways (perlite). But not all seeds are the same, some crops do need special instruction for germination. ...


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