Passion flower (Passiflora caerulea) is a vining plant that is notable for its spectacular flowers that are 3 to 4 inches in diameter. In general, it needs lots of very bright light with at least a few hours of direct sun. Protect it from hot midday summer sun, but otherwise provide as much direct sun as possible. Inadequate light is the most common reason for lack of flowers.

Passifloras do best in cool temps in the 55 to 65 degree range with good air circulation. Warmer temps and still air encourage spider mite infestations.

To flower, Passifora also needs a winter rest period. From October to April reduce the watering, allowing the soil to dry down about an inch from the top before watering thoroughly, stop fertilizing, and keep it in a cool spot. If you keep your Passiflora outside in the warmer months, it can stay outside as long as the temps stay above freezing; just be sue that you reduce the waterings in the cooler weather.

In April, prune back old growth by about one-third. Every 3 to 4 years it is best to cut back the entire plant to height of about 6 to 10 inches. In April, start watering whenever the surface of the soil feels dry and resume fertilizing at half-strength monthly.