What would be a hardy evergreen flowering vine that can live in Southern Ontario (5b)
Here is the map http://www.plantmaps.com/interactive-ontario-plant-zone-hardiness-map.php
What would be a hardy evergreen flowering vine that can live in Southern Ontario (5b)
Here is the map http://www.plantmaps.com/interactive-ontario-plant-zone-hardiness-map.php
Evergreen,flowering, climbing in Zone 5b - there isn't one I'm afraid. There isn't one that does that in the UK, and we're Zone 8, mostly, so I'm afraid it comes down to a choice between an evergreen shrub, or an evergreen climber like Hedera helix (Ivy) or a deciduous flowering climber.
If you decide you can tolerate a non-evergreen flowering climber, Campsis radicans is fully hardy in your zone, but note it flowers much better in a very sunny spot I think this plant is commonly known as Trumpet vine where you are.