Description
Tacca chantrieri is a rare and exotic perennial herb native to the tropical forests of Southeast Asia. It is renowned for its striking black to dark purple flowers resembling a bat in flight, complete with long whisker-like bracts that can extend up to 30 centimeters. The plant grows 60 to 90 centimeters tall, forming lush clumps of large, glossy green leaves. It thrives in warm, humid, shaded environments with rich, well-drained soil. Ideal for tropical gardens or indoor cultivation, the Black Bat Flower adds a dramatic and mysterious touch to any plant collection.
Germination Guide
🌍 Southeast Asia (Thailand, Malaysia, southern China, Vietnam, Myanmar, Laos, Cambodia, Bangladesh, Assam, and Tibet)
Very Difficult
Tacca chantrieri, commonly known as the Black Bat Flower, is a tropical herbaceous perennial native to Southeast Asian rainforests and belonging to the Dioscoreaceae (yam) family. The species is renowned for its extraordinarily striking bat-shaped flowers featuring dark purple to black bracts with long, whisker-like bracteoles. Seed germination is notoriously slow and difficult, often taking 2-6 months or longer, requiring consistent warmth (81-86°F), high humidity, and meticulous care to achieve successful propagation.
Germination
Germination time
Expect germination in
30 – 180 days
Temperature
Min 77°C
Ideal 81°C
Max 86°C
Substrate moisture
💧💧 High
Sowing depth
Lightly covered
Seed Pre-treatment
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💧
Soaking — 24 hours
Soak seeds for 24 hours in warm water (80-86°F/27-30°C) using a thermos. Water should be comfortable to hold in hand.
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🔨
Hot water scarification
Immerse seeds in warm water at 80-86°F (27-30°C) for 24 hours. Use a thermos to maintain water temperature. This process softens the seed coat and enhances germination.
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📋
Additional notes
Hot water immersion essential for germination. Seeds have slow and low germination rates in vivo, making pre-treatment critical for success.
Substrate & Container
Recommended substrate
Light, porous, well-draining seed-starting mix containing perlite, vermiculite, peat moss, coir, or pumice. Avoid heavy potting soil. A blend of 10% sand, 40% peat moss, and 50% fine bark is also suitable.
Recommended container
Sealed container with clear plastic dome or plastic wrap to maintain moisture and humidity. Use heat mat underneath to sustain 80-86°F temperature.
Growing Tips
For best results, clean seeds of sticky pulp before soaking. Sow seeds at 1/16 inch (1.5mm) depth in moist seed-starting mix. Keep container sealed to maintain humidity and use a heat mat to sustain optimal soil temperature of 80-86°F. Never allow soil to dry out. Once seedlings emerge, gradually acclimate to ambient humidity by venting plastic cover. Transplant seedlings into 3-inch pots when large enough to handle. Seeds are sensitive to damping-off disease; use treated seed-starting mix. The fresher the seed, the better the germination rate. Place container in warm location and avoid fluctuating temperatures. Be patient—germination can take several months but is rewarding once established.
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