Answer: Passion flowers is not rated hardy in Odessa, but there are always exceptions to the rules. The plant you saw in front of the restaurant is probably in a protected place (called a microclimate) where temperatures are slightly warmer. Being in a brick planter helps the roots stay warm because the bricks absorb and radiate heat even when air temperatures are cool. You may have similar results in the site you describe which would protect the plant from cold north winds and the brick wall will absorb and radiate heat at night. I'd give it a try - the plant is definitely worth the effort!
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