You Will Get 5 Seeds Passiflora Mollissima Banana Passionflower. Passiflora mollissima is rated as hardy to USDA zone 8.. They get gorgeous pink flowers on them for a long period in the summer, followed by long, banana shaped passionfruit occasionally seen in produce markets, and like all other passionflowers, they are vines and they will climb up anything that you provide for them to climb.. They grow best in full sun, and they prefer normal moisture levels, and actually prefer to be on the dry side in the winter.