well my north sumatra i just let it do its thing in a sink or swim sort of thing, and it came from a good friend of mine who had already hardened it off incredibly well, so there wasnt too much stress to it... it really does prefer highland conditions though, but honestly if you start out with a smaller plant, it will probably be a bit easier to acclimate it to your conditions because you can do what i have always done with medium/small plants and that is cover the pot in a clear ziploc or other form of bag that will hold its shape, and over time add holes into the bag until the RH inside the bag is the same as outside, generally by that time the nep is pretty well hardened off. or any other plant for that matter. spectabilis will more than likely sit for a few months and do nothing, my north sumatra did for a few months, and my gunung sinabung plant pitchers here and there but its a little more difficult to get a spectabilis to make upper traps than it is to make lower traps IMO and IME.... humidity and temps for both of my plants is the same for either plant at any given time, in the garage during late fall through early spring, the plants get temps in the 60s - 70s during the day, and high 40s to low 50s at night, humidity generally in the 50-65% range....
and like i said, it really does prefer highland conditions, it will do a lot better for you with a good temperature drop at night, into the low 60s or upper 50s would be ideal, but mid 60s or so would be fine as well.... This plant does like to produce basals once i gets into the vining stage, i would generally leave one basal only as they will exhaust the main vine, and kill it off, but that just means the basal will take over as the main vine, and you can allow a new basal to emerge and continue the process, plus the other basals you can cut off and root for more plants
an added bonus.
