How to Grow Tannia
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Tannia
Xanthosoma sagittifolium
vegetableTannia is a tropical root vegetable in the aroid family, valued for its starchy tubers that resemble small taro. It produces large arrow-shaped leaves and thrives in warm, humid climates. The plant yields edible corms that are a staple carbohydrate source in Caribbean and Central American cuisines.
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Example Tannia timeline · Pittsburgh, PA (Zone 6b)
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Plant Tannia
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Tannia
Around Oct 14≈ 180 days after planting
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Growing Conditions
Soil
Growing Zones
Find your zone →Zones 10-12; can be grown in containers in cooler zones
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Planting & Establishment
3-4 weeksCormels or corm pieces are planted in prepared soil; shoots begin to emerge within 2-3 weeks
Ensure soil is warm (70°F+) and moist; mulch around plants to retain moisture and regulate temperature
Vegetative Growth
8-12 weeksPlant develops 3-5 large arrow-shaped leaves; stem thickens and secondary shoots may emerge; vigorous foliage growth
Apply balanced fertilizer every 4-6 weeks; maintain consistent moisture; remove weeds regularly; ensure good air circulation
Corm Enlargement
8-10 weeksMain corm increases significantly in size; secondary cormels develop around the base; foliage remains lush
Maintain consistent moisture; apply phosphorus-rich fertilizer to support tuber development; monitor for pests
Maturation & Harvest Ready
Final 4-6 weeksCorms reach harvestable size (3-8 inches); leaves may begin to yellow slightly; plant is 6-9 months old
Reduce watering slightly as harvest approaches; stop fertilizing 4-6 weeks before harvest
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Remove infected leaves; improve air circulation; avoid overhead watering; use disease-free planting material
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Use virus-free cormels; control aphid vectors with insecticidal soap; remove infected plants
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Spray with neem oil or insecticidal soap; wipe leaves with damp cloth; maintain good air circulation
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Increase humidity; spray with water or miticide; use neem oil
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Rotate crops; use nematode-resistant varieties; solarize soil before planting
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Hand-pick; use Bt (Bacillus thuringiensis); remove plant debris
Uses
Starchy Staple Food
CulinaryTannia corms are boiled, fried, mashed, or roasted as a carbohydrate source similar to potatoes. The mild, slightly nutty flavor makes them versatile in soups, stews, and curries throughout the Caribbean and Central America. [source]
Leaf Greens (Callaloo)
CulinaryYoung tannia leaves are cooked as a nutritious green vegetable, rich in vitamins A, C, and minerals. They are used in traditional dishes like callaloo soup and can be sautéed or boiled. [source]
Digestive & Nutritional Support
MedicinalTannia is high in fiber, potassium, and B vitamins, supporting digestive health and overall nutrition. Traditional medicine in tropical regions uses tannia to support digestion and provide energy. [source]
Food Security Crop
HouseholdTannia is a reliable, productive crop for household food security in tropical and subtropical regions. It stores well and provides calories and nutrients year-round with minimal input. [source]
Ornamental Foliage Plant
WildlifeThe large, attractive arrow-shaped leaves make tannia an excellent foliage plant for tropical gardens and landscapes. It can be used as a screen or backdrop in tropical and subtropical settings. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest 6-9 months after planting when corms are 3-8 inches in diameter and skin is firm; carefully dig around the base of the plant to avoid damaging corms; harvest main corm first, then smaller cormels; best done during dry season to reduce disease; store in cool, dry conditions with good ventilation; corms can be stored for several weeks to months
Fun Facts
- 🌱 Tannia is also called 'new cocoyam' and is native to tropical South America; it has been cultivated for thousands of years in Caribbean and Central American cultures.
- 🌱 Unlike taro, tannia produces both a main corm and multiple side cormels, allowing multiple harvests from a single planting in some cases.
- 🌱 The plant's large leaves can transpire significant amounts of water, making it an excellent indicator of moisture stress in tropical gardens.
Gardening Terms
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