Few guides mention that the most potent lines are often the loudest, and a single high THC plant can be smelled from the street without a filter. A carbon filter sized for the tent volume handles it, while the cheap gel pots and sprays do nothing against a terpene load. The odour ratings listed per strain on https://potentthcseeds.com helped me pick a line of THC seeds that is strong but not overwhelming for a shared building. Plan the filter before the seeds go in, not after the neighbours ask.
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