How to Grow Giant Taro
iNaturalist
Giant Taro
Alocasia macrorrhiza
vegetableGiant Taro is a tropical perennial plant grown for its large, starchy corms (underground tubers) and edible leaves. Native to Southeast Asia, it produces dramatic large-bladed foliage and can reach 6-10 feet in height under optimal conditions. The plant thrives in warm, humid environments and is a staple food crop in Pacific Island and Asian cuisines.
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Example Giant Taro timeline · Pittsburgh, PA (Zone 6b)
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Plant Giant Taro
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 Giant Taro
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in USDA zones 10b-12; grows best in tropical and subtropical climates with year-round warmth
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Get my Giant Taro timeline →Growth Stages
Sprouting
2-4 weeksSmall shoots emerge from corms; first leaf unfurls; minimal visible above-ground growth
Keep soil warm (70-80°F minimum) and consistently moist; ensure good drainage to prevent corm rot; maintain high humidity
Vegetative Growth
3-6 monthsRapid leaf production with increasingly large blade development; plant height increases dramatically; multiple leaf stems emerge from corm
Provide consistent moisture and humidity; apply balanced fertilizer monthly; provide partial shade in intense heat; stake if needed in windy locations
Mature Foliage
3-6 monthsLarge arrow-shaped leaves (2-4 feet long) dominate the plant; corm enlarges significantly underground; plant reaches full height; occasional flowering may occur
Continue regular watering and humidity misting; apply slow-release fertilizer; monitor for pests and diseases; occasional flower removal encourages corm development
Corm Development
6-12 monthsUnderground corm expands substantially; plant establishes extensive root system; secondary cormels may develop around main corm
Maintain consistent soil moisture without waterlogging; apply potassium-rich fertilizer to encourage corm enlargement; reduce nitrogen to prevent excessive leaf growth
Harvest Ready
Indicator stage (ready to harvest)Corm has reached marketable size (1-3+ pounds); foliage may yellow or decline if corm is mature; plant is 8-12+ months old
Stop watering 1-2 weeks before harvest to firm up corm; harvest by carefully digging and lifting entire plant; separate cormels for replanting
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity; spray with water; use miticide if severe; neem oil application
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Inspect regularly; remove by hand; apply neem oil or horticultural soap; systemic insecticide for severe infestations
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Hand-remove or scrape off; apply horticultural oil; neem oil spray; systemic insecticide if needed
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Increase humidity and air circulation; insecticidal soap; neem oil; yellow sticky traps
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Allow soil surface to dry slightly between waterings; use sand topdressing; yellow sticky traps; biological controls (Steinernema nematodes)
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Prevent by avoiding waterlogging; improve drainage; remove infected corms; do not replant in contaminated soil; sterilize tools
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Improve air circulation; reduce leaf wetness; prune affected leaves; fungicide spray (copper sulfate or sulfur-based); sanitize tools
Uses
Starchy Root Vegetable
CulinaryThe corms are boiled, roasted, fried, or mashed as a staple carbohydrate similar to potatoes or taro. They have a mild, slightly sweet flavor and creamy texture when cooked, making them versatile in tropical cuisine. [source]
Nutritious Leafy Greens
CulinaryYoung leaves are cooked like spinach or in soups and curries; they are rich in vitamins A, C, and minerals. Mature leaves must be thoroughly cooked to remove calcium oxalate crystals that cause mouth irritation. [source]
Traditional Herbal Remedy
MedicinalIn traditional Southeast Asian and Pacific medicine, taro is used to treat digestive issues, fever, and inflammation. The corm and leaves contain compounds believed to have anti-inflammatory and digestive properties. [source]
Sustainable Food Security
HouseholdGiant Taro is a reliable, high-yield crop for tropical home gardens, producing large quantities of nutritious food from minimal space and providing year-round harvests. [source]
Ornamental Foliage Plant
CraftThe dramatic large heart-shaped leaves with prominent veining make Giant Taro a striking specimen plant for tropical landscaping and large indoor spaces, even when not harvested for food. [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 corms 8-12 months after planting when they reach 1-3+ pounds; plant dies back or foliage yellows at maturity; carefully dig around the plant to avoid damaging the corm; lift entire plant and shake off soil; separate cormels (small side corms) and store separately for replanting; store mature corms in cool (50-60°F), dry location with good air circulation for 2-4 weeks before use; harvested corms can store for several months in proper conditions; young leaves can be harvested throughout growing season for cooking
Fun Facts
- 🌱 Giant Taro is one of the oldest cultivated crops in the world, with origins in Southeast Asia and New Guinea dating back over 10,000 years; it was carried by Polynesian voyagers across the Pacific and became essential to island societies.
- 🌱 The plant's large leaves can exceed 3-4 feet in length and width, making individual plants capable of dramatic visual impact; some cultivars have nearly black foliage adding striking contrast to tropical gardens.
- 🌱 Raw taro contains calcium oxalate crystals that cause mouth and throat irritation, but these are completely destroyed by cooking; this is why taro must always be thoroughly cooked before consumption, unlike potatoes.
Gardening Terms
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