The perennial passion fruit vine (Passiflora edulis) is a tender, tropical evergreen or deciduous vine that grows to a height of 12 feet with a spread of up to eight feet. It flourishes in zones 6 to 9. Just protect the main trunk near the bottom from frost in the winter and it will regrow in the spring each year. The vine produces unique tropical white, lilac, purple or blue blossoms that measure up to three inches in diameter. In fall, edible, egg-sized fruit appears on the vine. This is one of my favorite tropical vines. I grow it all over my backyard and the juice is wonderful.