Most wait for the passion vine to bear fruit before harvesting the vines, but the flowers also make an edible garnish for desserts and drinks. According to the University of Florida, the purple variety of passion fruit vine begins to flower in the spring and stops flowering during the heat of the summer. If you wish to harvest your flowers before they become fruit, you need to pull them from the vine during the flowering of the late spring and early summer, but this time might differ depending on your part of the country.
Look for wide open passion flowers, and harvest in the morning after the dew has evaporated.
Snip individual flowers from the vine with the shears, cutting the stem of the flower off at the vine.
Cut the base of the stem from the back of the passion flower.
Pull the pistils, stamens and sepals of the passion flowers, using your fingers to pick them from the center of the flower.
Rinse and pat dry the passion flowers before adding them as a garnish for desserts or drinks.
Use whole flower heads in salads to add a mild, vegetal flavor. Optionally, steep the flower heads in hot chocolate or tea for five to 10 minutes to create a passion fruit beverage.