Passionflower has many varieties. While most passionflowers are climbing or prostrate vines, there are some that are classified as shrubs, annuals, perennials, and trees. The best place to plant passionflower is moist but well-drained soil in a sunny location with shade from a wall or trellis. Most, but not all, passionflowers produce edible fruits.
Turning on
To keep this plant healthy and blooming, you can plant it in full sun or shade. This plant can grow in very hot climates. Passionflowers generally need at least four to six hours of full sun per day. If you bring potted specimens indoors during the winter, provide them with bright, indirect light and keep them out of drafts.
Planting and soil
The soil you plant the vines in should be well-drained but rich and moist. You can add compost to the planting hole to help provide nutrients, and mulch around the base of the plant will help retain moisture without waterlogging the plant.
Irrigation
Passionflowers should receive deep watering immediately after planting. Beyond that, they typically thrive with one or two waterings per week during their growing season. Be sure to provide 1 to 1.5 inches of water each week.
Temperature and humidity
This plant loves warm weather and may need winter protection in colder regions. To prevent your plant from dying again, bring it indoors when the temperature drops. Plant in an area protected from the wind, this can cause damage to the stems and burning of the leaves.
Fertilizer
Passionflower vines are heavy feeders and will grow well using a balanced all-purpose fertilizer with equal proportions of nitrogen, phosphorus and potassium. Fertilize the plant before new growth appears in early spring, then repeat every four to six weeks until early fall.
Source: https://www.homifine.com