Passiflora Species, Crato Passion Vine, Passion Flower

This plant grew wild for several years on a low grassy debris hill at a nearby hospital grounds. It grew in full sunshine as a groundcove...Read Morer with intriguing purple blooms from mid-summer to frost. Probably would have had more blossoms if cultivated. Disappeared after landscaping.
I sometimes see these vines growing in wild areas, usually without apparent flowers.

The purple passion vine is the only one I have found to be hardy in Oklahoma City. It is late to start growing (late June to Mid July.)...Read More
When it starts growing, it is very aggressive and can climb anything. Blooms appear mid August until Freeze. It will be covered with Gulf Fratilitally butterflies and caterpillars until frost.
I pull it down and cut it back to about 18" at first frost
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I'm not sure this plant is supposed to grow in zone 5-B, but it did for us. It was planted by the previous homeowners and they had put a...Read More string trellis over most of the South side of the brick house. The vine actually grew up from a crack where the driveway met the house. I guess it was protected there and kept warm. We lived there for ten years and it faithfully bloomed each year. One year it actually grew right into the house, where a house addition met the structure. After we moved to a new house, we were sad to see that the new homeowners had removed the vine.