I keep seeing things while looking for a good potting soil (long story short I got a bad bag and my house is full of fungus gnats that are so resilient I'm going to re-pot everything), about some soils being "hot" and that plants need to get used to it. Particularly brands like Fox Farm. I'm having trouble understand what it means that it's "hot" for plants, because I'm pretty sure they don't mean it's popular, people appear to be referring to temperature. How is a potting soil generating heat? I'm very confused.
I keep seeing things while looking for a good potting soil (long story short I got a bad bag and my house is full of fungus gnats that are so resilient I'm going to re-pot everything), about some soils being "hot" and that plants need to get used to it. Particularly brands like Fox Farm. I'm having trouble understand what it means that it's "hot" for plants, because I'm pretty sure they don't mean it's popular, people appear to be referring to temperature. How is a potting soil generating heat? I'm very confused.