Passion fruit is a tropical fruit that is native to Brazil and other parts of South America. It has a sweet and tart flavor with notes of mandarin, orange, and pineapple. Passion fruit is rich in antioxidants and dietary fiber. Passion fruit is a flowering tropical vine known as Passiflora that grows in warm climates such as South America, Australia, South Africa, and India. It contains vitamins A, B and C, fiber and potassium.