Not sure what you mean by "hummingbird vine". If also known as cypress vine or cardinal flower, Ipomoea quamoclit, it is an annual and will not survive winter. And may be difficult to try to keep alive indoors until safe to plant out in spring. If you haven't used all the seeds, I'd try some additional starts in late winter/early spring, closer to when it can be safely planted outdoors. If it is trumpet vine, Campsis radicans, it should be winter hardy but likely a bit late this season where you are to plant now. As a perennial woody vine, trumpet vine will take several years from the seedling stage to establish to the point where it will produce flowers. And in my climate, it is most definitely NOT a spring bloomer, being quite late to leaf out and with flowers appearing in mid to late summer.

Do you know what the botanical name is of your seedlings? It should be on the seed package.

The Botanical Name is Campis radicans. Common Name is Trumpet Creeper. It's a zone 4-9 perennial, I'm in Missouri. I read that it's a very aggressive plant & not the best for close to the house or deck, so I'm going to plant it to grow up a trellis.
Thanks for your help.
Jan