(Continued from Part 1.) Gear and Materials: Soil The first trays I grew using ordinary Central Texas yard dirt and the results were good. But dirt from outdoors can introduce mold, gnats, and other insects, so I have been using potting soil ever since. Professional growers will use various mixtures which might include perlite, vermiculite, compost, or coconut coir. Some grow hydroponically. Some add fertilizers and nutrients. It’s very likely that, by following their recommendations, or through experimentation, I might increase yield or see other benefits. But I’m satisfied with the results I’m seeing for now, and I suspect in …