m0useanswered grow question 24 days ago Cold Weather does not help produce trichomes. Light does in conjugation with nutrients.
And even if you meant terpenes its also a myth. The cold temps just prevent them from off gassing as much so you smell them more, but the temps don't contribute to an increased production of them. If anything cold weather under 10c or 50f slows overall plant growth trichomes/terps combined.
17f is -8c... that's below freezing and cannabis does not tolerate frost well, it is best to chop and harvest before a hard frost hits. If they get hit with a hard frost all the leaves turn to mush. does not make for a pretty dried bud, looks like wilted lettuce.