→Dry to aw < 0.65 and keep the drying room below 50% RH – visible mold only begins at aw > 0.75.
→Buy only from transparent suppliers with current batch-specific COAs – PGR-contaminated material cannot be fixed after the fact.
→Cannabis is a hyperaccumulator for heavy metals from substrate and nutrients – use only tested, low-heavy-metal nutrient sources and water, especially regarding lead and cadmium.
→Use only approved agents and observe at least a 14-day flushing period before harvest – document every application with date and amount.
→If you find mold or an off-smell in one jar, check the entire harvest from the same drying/curing batch – don't just cut out the one spot, mycelium spreads invisibly further than what's visible.
→Check the germination rate across multiple orders for a seed bank or nutrient brand (target: 80-95%+) and demand a third-party lab COA instead of in-house test results.