Blue Passion Flower: Spectacular Blooms on Vigorous Vines

Botanical Name: Passiflora caerulea

Unmistakable 4–6 inch purple, white, and blue flowers with green anthers appear in late summer and fall, followed by small edible (but seedy) yellow-orange fruits. Fast-growing, lobed dark-green leaves clothe twining stems that can reach 10+ feet. Train on a hoop or trellis, tie loosely with florist wire.

Keys to Success

Prune in Spring

Cut stems back just before heavy blooming season, careful not to remove flower buds. Use sharp pruners.

Sun, Warmth, Humidity

Needs at least 4 hours direct sun daily — south window, sunroom, or greenhouse best. High humidity essential: pebble tray + daily misting. Because of these needs, it's challenging in average homes; greenhouse ideal.

Pot-Bound for Blooms

Repot young plants in spring. Older plants: top-dress (replace top 2 inches soil). Don't overpot — crowded roots = more flowers.

Quick Reference: Passion Flower Care

• Origin: South America (Brazil, Argentina rainforests)
• Height: Up to 10 ft (3 m)
• Light: 4+ hours direct sun daily
• Water: Evenly moist spring–fall; barely moist in winter
• Humidity: High; pebble tray + daily misting with room-temp water
• Temperature: 55–60°F (13–16°C) nights / 70–75°F (21–24°C) days
• Soil: Any good potting mix
• Fertilizer: Liquid monthly spring–fall, diluted by half. None in winter.
• Propagation: 6-inch stem tip cuttings in summer, root in moist mix