Why won’t my passionflower produce fruit?

More than 400 passionflower varieties exist, but only a few dozen species produce edible fruit. Fruit bearers require pollination. Some varieties (such as P. incarnata) are self-pollinating, and require only visits from insect pollinators such as carpenter bees. Other varieties (such as P. edulis) are self-sterile, and require pollen from similar plants. The most reliable method is to pollinate by hand, dusting each pistil with pollen from stamens of another flower

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