either southdevonchillifarm or seaspringseeds should indicate which varieties are quick or slow
i managed to grow bird eye peppers from seeds stolen from shop bought peppers once
habaneros that I planted in 2nd week of feb (previous years, not this year) took a few weeks to germinate, and until about this time of year to actually have flowers. then fruit at the ripening stage in November.
other varieties I have planted later (april) and got fruit much earlier (june/july).
reminds me I ought to think about ordering some fresh seeds ready for jan/feb.
that’s in my kitchen, with a west facing floor to ceiling window with a radiator big enough to use like a heat mat.