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. There are 400 species of passion fruit vines available, according to Floridata. 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.
Passion fruit vines grow well in full sunlight or partial shade. Full sunlight normally helps the vine produce more abundant flowers and fruit. Plant in a well-draining location with no standing water. The passion fruit vine enjoys moist soil conditions.
Supply support for the ample passion fruit growth. Use a trellis, arbor, fence or tree for the vine to climb. The vine uses tiny tendrils to climb, which it curls and wraps around to secure itself. The vine is often planted along ditches to help control soil erosion.
The vine produces a shallow root system that easily dries out. Adding two to three inches of mulch under the vine helps keep the root system moist and shaded during intense summer heat. Keep the plant thoroughly watered if there is not adequate rainfall. The vine requires at least 35 inches of annual rainfall, according to the California Rare Fruit Growers.
The passion fruit vine will bear fruit at one to three years of age. When ripe, the fruit turns yellow, deep green or purple depending on the variety. Ripening normally occurs 70 to 80 days after the flower's pollination. Harvest the fruit by picking it up from the ground or picking it from the vine. Fruit appear slightly shriveled when fully ripe.
Apply three lbs. of 10-5-20 granulated fertilizer to each passion fruit vine four times per year. Water the fertilizer thoroughly into the soil. If the vine sustains frost damage, promptly fertilize once the vine recovers and new growth begins.
Prune the passion fruit vine after harvesting all fruit. Pruning in cool areas can take place successfully in the early spring. Prune at least one-third of the vine away and remove any dead or weak growth.