Answer: Based on your zip code you are gardening in zone 5B, the warmer part of zone 5. The passion flowers listed in Monrovia's on line descriptions are hardy only to zone 9 or 10 (think southern Florida). There are some hardier types such as P. caerulea which some sources list as being hardy to as cold as zone 6, and quite a few in the zone 8 range. Depending on what kind you planted, it is conceivable it might have survived in a very warm microclimate in your yard, but to be honest I don't think it is too likely that a passionflower would survive the winter outdoors in Ohio. There are many showy warm climate plants on the market today to be grown as patio plants and brought indoors for the winter or simply replaced each spring. Perhaps yours were intended for one of these uses. I'm sorry I can't be more encouraging.
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