This is absolutely true for the fruit of Passiflora edulis, passion fruit. When ripe, these fruits are hard and wrinkled, looking more like something that was forgotten in the back of the refrigerator ...

Passion fruit (Passiflora edulis), renowned for its nutritional richness and aromatic fruits, is widely cultivated in tropical and subtropical regions. Passion fruit can not only be harvested year ...

The passion fruit that is most commonly eaten is Passiflora edulis, although there are a number of locally produced varieties around the world. You can grow P. edulis in a greenhouse.