About Giant Elephant Ear
A massive, dramatic tropical plant producing enormous, upright, arrow-shaped leaves that can span over a meter across on thick, fleshy stalks. Native to the Philippines, it is a bold landscape specimen that instantly creates a tropical rainforest atmosphere. Its sheer size and architectural form make it a centerpiece plant in Filipino gardens and resort landscapes. Giant Elephant Ear belongs to the Araceae family and originates from Philippines, Borneo, and tropical Southeast Asia; one of the largest Alocasia species in the world..
Giant Elephant Ear is native to the Philippines and can be found growing wild in provinces across Luzon, Visayas, and Mindanao. Filipinos know it as 'birang' or 'biga' and have traditionally used the starchy corm as emergency food (after extensive cooking to remove toxins). In modern landscaping, it is prized for instant tropical drama in resort gardens, subdivision entrance planting, and large patio containers. The rare variegated form commands astronomical prices — PHP 10,000 to over PHP 100,000 — in Filipino collector circles and plant auctions.
Also known as: Giant Taro, Biga.
Popular Varieties
- Alocasia macrorrhizos 'Variegata' (stunning white and green variegation — highly prized collector's plant)
- Alocasia macrorrhizos 'Borneo Giant' (even larger leaves, can exceed 1.5 meters)
- Alocasia macrorrhizos 'Black Stem' (dark purple-black petioles)
- Alocasia macrorrhizos standard form (glossy green, the classic giant)
How to Plant Giant Elephant Ear in the Philippines
Giant Elephant Ear can be propagated through division of rhizomes, offsets (pups). The recommended method is separating offsets from the mother plant during the rainy season.
Propagation Steps
- Step 1: Dig around the base of a mature plant and locate offsets growing from the main rhizome.
- Step 2: Use a sharp, clean spade or knife to separate an offset with its own roots.
- Step 3: Allow the cut surface to dry in shade for a few hours to prevent rot.
- Step 4: Plant the offset in rich, moist garden soil or a large pot with good drainage.
- Step 5: Water deeply and keep consistently moist — new growth appears within 2-4 weeks.
Care Guide
Sunlight
Full sun to partial shade; leaves grow largest in bright, filtered light with some morning sun. Position your giant elephant ear where it receives the right amount of light for healthy growth in Philippine conditions.
Water
Water abundantly and consistently — this plant loves moisture. Water daily or every other day during the dry season. Reduce slightly during rainy months but never let it dry out completely. Adjust frequency during the Philippine rainy season when humidity is higher and soil stays moist longer.
Temperature & Humidity
Ideal temperature range: 25-35°C (perfectly suited to lowland Philippine heat). High — thrives in Metro Manila's natural humidity; the wetter, the better The warm, humid Philippine climate is well-suited for growing giant elephant ear outdoors or indoors.
Fertilizer
Heavy feeder. Apply nitrogen-rich fertilizer (urea 46-0-0 or 14-14-14) monthly during the growing season to support its massive leaf production.
Pruning
Remove old, tattered, or yellowed leaves at the base to keep the plant looking fresh. Wear gloves — the sap can irritate skin.
Toxicity & Safety
Toxic if ingested raw — contains calcium oxalate crystals that cause intense mouth and throat irritation. Sap causes skin irritation. Wear gloves when handling and keep away from children and pets.
Common Problems & Solutions
Drooping or wilting leaves
Cause: Underwatering or extreme heat stress
Solution: Water deeply and immediately. In scorching weather, water twice daily — morning and late afternoon.
Yellow leaves
Cause: Natural leaf turnover, overwatering in heavy clay soil, or nutrient deficiency
Solution: If only lower leaves yellow, it is normal. Improve drainage if soil stays waterlogged. Apply balanced fertilizer.
Spider mites on leaf undersides
Cause: Dry conditions — unusual in Manila but possible in sheltered spots
Solution: Hose down leaves forcefully to dislodge mites. Spray neem oil on leaf undersides weekly.
Root rot
Cause: Waterlogged soil with no drainage
Solution: Amend heavy clay soil with compost and coarse sand. Ensure containers have large drainage holes.
Frequently Asked Questions
How do you care for Giant Elephant Ear in the Philippines?
Giant Elephant Ear needs full sun to partial shade; leaves grow largest in bright, filtered light with some morning sun. Water abundantly and consistently — this plant loves moisture. water daily or every other day during the dry season. reduce slightly during rainy months but never let it dry out completely.. Feed with heavy feeder. apply nitrogen-rich fertilizer (urea 46-0-0 or 14-14-14) monthly during the growing season to support its massive leaf production.. The Philippine climate with temperatures of 25-35°C (perfectly suited to lowland Philippine heat) works well for this plant.
How do you propagate Giant Elephant Ear?
The recommended method is separating offsets from the mother plant during the rainy season. Dig around the base of a mature plant and locate offsets growing from the main rhizome. Use a sharp, clean spade or knife to separate an offset with its own roots.
Is Giant Elephant Ear toxic to pets or children?
Toxic if ingested raw — contains calcium oxalate crystals that cause intense mouth and throat irritation. Sap causes skin irritation. Wear gloves when handling and keep away from children and pets.
Can Giant Elephant Ear grow in containers in the Philippines?
Giant Elephant Ear is best grown in the ground or very large containers. It needs ample root space to reach its potential. In smaller urban spaces, choose dwarf varieties when available.
What are common problems when growing Giant Elephant Ear?
Common issues include: Drooping or wilting leaves (caused by underwatering or extreme heat stress — water deeply and immediately. in scorching weather, water twice daily — morning and late afternoon); Yellow leaves (caused by natural leaf turnover, overwatering in heavy clay soil, or nutrient deficiency — if only lower leaves yellow, it is normal. improve drainage if soil stays waterlogged. apply balanced fertilizer); Spider mites on leaf undersides (caused by dry conditions — unusual in manila but possible in sheltered spots — hose down leaves forcefully to dislodge mites. spray neem oil on leaf undersides weekly).
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