The Third Mark, a symptom-first mushroom reference

Field notes

The site organizes mushroom cultivation as a progression from spore to mycelium, primordia, and fruiting body, with separate sections for diagnosis, species, substrates, process, and equipment. Its diagnostic entry points use observable signs—including green substrate, sour-smelling grain, stretched stems, and dying pins—instead of requiring visitors to identify a contaminant first. The reference also names concrete substrate classes such as straw, sawdust, grain, coir, and manure, and says species pages standardize temperatures, timings, and yields for comparison.