If they've started getting in some of their mature leaves (angular as opposed to the immature roundish ones) you can move them outside to acclimate them to daily temperature changes. Start off with someplace bright but out of direct sunlight. After a few days, you can move them to where they get morning sun or filtered sun during the day. Passiflora are adapted to be understory plants early on before climbing over brush/trees to become the massive vines we think of them as.

When they get about a foot tall with multiple leaves, and you've gradually increased their sun exposure, you can safely plant them in the ground so they can expand their root system before winter. Incarnata should come back from the roots after dying down over the winter. Caerulea ought to be hardy for you as well. You might want to keep a handful in pots over the winter in case the ones you put in the ground don't get established enough before winter hits.