Black Bat Flower (Tacca chantrieri) Care: Growing Exotic Bat-Like Blooms

The black bat flower (Tacca chantrieri) is a striking tropical perennial native to Southeast Asia. Its bizarre, bat-shaped inflorescence—complete with wing-like black bracts and long, whisker-like filaments—makes it a coveted specimen for shade gardens and containers. Also called cat’s whiskers or devil flower, it grows from rhizomes, reaching 24–36 inches tall with large, pleated leaves up to 15 inches long. Hardy only in USDA zones 10–11; elsewhere, grow in containers and move indoors for winter.

Growing Requirements

• Soil: Fertile, well-drained; pH 6.1–7.5. Mixes: 50% pine bark/40% peat moss/10% sand, or 60% peat/30% perlite/10% vermiculite. Orchid potting mix works well.
• Light: Bright indirect light or light shade. No direct sun. Indoors: south-facing window. Minimum 4 hours bright indirect light.
• Temperature: Summer 77–84°F; winter 59–64°F. Never below 55°F.
• Humidity: 50–70%. Use pebble trays or humidifier. Avoid misting—open leaf pores cause water loss. No strong drafts.

Watering and Fertilizing

• Growing season (late spring–late summer): Water regularly; keep soil evenly moist but not soggy. Rhizomes rot in standing water.
• Winter: Water sparingly; keep soil slightly moist during spring emergence.
• Fertilizer: Feed every 2 weeks with half-strength balanced fertilizer or orchid fertilizer. Stop during dormancy.

Repotting and Propagation

• Repot annually in early spring into a larger pot. Divide rhizomes at this time; plant each in appropriately sized pot.
• Do not repot while blooming.
• New plants: keep in low light initially, then gradually increase.
• Seeds: Collect from pods, remove pulp, air-dry 2–3 days, soak in warm water 24 hours. Sow in seed-starting mix at 80–85°F. Germination: 1–9 months. Transplant seedlings to 3-inch pots when large enough; feed lightly.

Troubleshooting

• Brown, lifeless leaves: increase humidity.
• Blackened new leaves: check for extreme temperatures, direct sun, or strong wind.
• Slugs/snails: hand-pick or use organic bait.

The black bat flower demands specific conditions but rewards with one of the most extraordinary blooms in the plant world. Provide warmth, humidity, filtered light, and excellent drainage for success.