How to Grow Giant Taro
Wikimedia Commons
Giant Taro
Alocasia macrorrhiza
shrubA dramatic tropical foliage plant with massive arrow-shaped leaves that can exceed 3 feet in length, featuring prominent veins and a deep green color. Native to Australia and Southeast Asia, it grows as a large spreading perennial that demands warm, humid conditions. This impressive houseplant or outdoor specimen creates bold architectural interest in any garden or interior space.
When should you plant Giant Taro in your zone?
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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)
Sample dates for Pittsburgh, PA. Sign up to get exact Giant Taro dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 10b-11; grown as a houseplant in cooler climates
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Get my Giant Taro timeline →Growth Stages
Sprouting
2-4 weeksInitial emergence of small leaves from dormant corms, typically 1-2 leaves unfurling
Maintain warm conditions (70-80°F), high humidity, and consistently moist soil; provide bright indirect light; avoid moving plant during this delicate phase
Establishment
4-8 weeksRapid leaf production with successive new leaves emerging; plant developing a visible stem and root system
Continue warmth and humidity; begin feeding with diluted balanced fertilizer every 3-4 weeks; ensure excellent drainage; provide support if needed
Vegetative Growth
6-12 monthsSteady production of increasingly larger leaves; dense foliage with stems strengthening and visible corm expansion
Maintain regular watering and humidity; fertilize every 2-3 weeks during warm months; rotate plant periodically for even growth; clean leaves with soft cloth to maximize light absorption
Maturity
OngoingPlant reaching full size with massive leaves (24-36+ inches long); possible flowering with pale yellow spathes in spring
Reduce fertilizing frequency; maintain consistent warm, humid conditions; space adequately for air circulation; support heavy leaf weight if necessary
Dormancy (Seasonal)
2-4 months (winter or dry season)Reduced growth or leaf drop during cooler months or dry periods; plant may appear less vigorous
Reduce watering significantly but don't let soil dry completely; minimize fertilizer; maintain as much warmth as possible; lower light requirements acceptable during this phase
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity to 60%+; spray leaves with water misting; use neem oil or insecticidal soap; isolate affected plants
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Remove with alcohol-soaked cotton swab; spray with insecticidal soap or neem oil; treat weekly until resolved
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Manual removal with soft brush; apply horticultural oil; treat with insecticidal soap; check undersides of leaves regularly
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Improve drainage immediately; reduce watering frequency; repot in fresh soil if severe; remove affected roots with sterile tools
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Remove affected leaves; improve air circulation; avoid wetting foliage; apply fungicide if widespread
Uses
Dramatic Indoor Specimen Plant
HouseholdAlocasia macrorrhiza serves as a stunning living focal point in homes, offices, and conservatories with its massive architectural leaves. Its bold tropical aesthetic instantly transforms interior spaces into lush garden rooms. [source]
Traditional Starchy Food
CulinaryIn Southeast Asian and Pacific Island cuisines, the corms (underground storage organs) are harvested and cooked as a starchy staple food, with a texture similar to taro. Must be thoroughly cooked to eliminate oxalates and other irritating compounds. [source]
Traditional Medicine Applications
MedicinalIn traditional Southeast Asian medicine systems, various parts of Alocasia macrorrhiza have been used to treat inflammation, wounds, and digestive issues, though scientific evidence is limited. Modern use should be cautious due to calcium oxalate crystals in raw plant material. [source]
Floral and Design Arrangements
CraftThe massive dramatic leaves are prized by florists and interior designers for tropical and contemporary arrangements, tropical weddings, and large-scale landscape installations. A single leaf creates substantial visual impact in formal and informal designs. [source]
Tropical Garden Ecosystem
WildlifeIn outdoor tropical settings, Alocasia macrorrhiza provides shelter and structure for beneficial insects, small animals, and creates a naturalistic layered canopy effect that supports biodiversity. Its large leaves collect rainfall and create microhabitats. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Not typically harvested as this is a foliage ornamental plant. However, in tropical regions where corms are edible, harvest mature corms (12-18 months old) by digging carefully, cleaning, and cooking thoroughly to remove toxins. Mature leaves can be pruned for floral arrangements or to manage size and shape.
Fun Facts
- 🌱 Alocasia macrorrhiza gets its species name 'macrorrhiza' from Greek words meaning 'large root,' referring to its massive underground corms that can weigh 10+ pounds and grow several feet across.
- 🌱 The plant produces a distinctive clicking sound as water droplets move through its leaves—a phenomenon called 'guttation' where excess water is expelled through specialized leaf pores, especially noticeable at night.
- 🌱 In tropical Pacific cultures, the plant is called 'Elephant Ear' due to leaf shape, while in Australia it's known as 'Giant Taro' or 'Cunjevoi,' and was used by Indigenous peoples as both food and medicine for thousands of years.
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