Guide botanique
Elephant Ear.
Alocasia or Colocasia
Prononciation uh-LOH-see-uh
Aussi appelée Alocasia or Colocasia, Taro

Alocasia, commonly known as Elephant Ear, is a genus of tropical plants prized for their large, dramatic leaves. They bring a bold, exotic feel to any space, thriving in warm, humid environments. These plants are a fantastic choice for adding a touch of the tropics indoors or in sheltered outdoor areas.
En un coup d'œil
- Care level
- Moderate
- Plant type
- Perennial herbaceous plant
- Light
- Bright, indirect light
- Indoor light
- bright-indirect
- Water
- Every 3 to 7 days
- Mature size
- Up to 3 meters tall and wide
- Growth rate
- fast
- Hardiness
- USDA 10 to 12
- Bloom time
- Summer
Entretien
Provide bright, indirect light and keep the soil consistently moist but not waterlogged. These plants love humidity, so misting or using a humidifier is beneficial. Avoid direct sunlight, which can scorch the leaves, and protect them from cold drafts.
- Watering
- Keep soil consistently moist, allowing the top inch to dry slightly between waterings.
- Feeding
- Feed with a balanced liquid fertilizer during the growing season.
- Pruning
- Remove yellow or dead leaves as needed to maintain appearance and plant health.
- Repotting
- Repot when the plant becomes root-bound, typically every 1-2 years.
- Soil
- Rich, well-draining potting mix
- Soil pH
- 5.5 to 6.5
- Temperature
- 18 to 27°C
- Humidity
- 60 to 80%
- Drought tolerance
- low
- Lifespan
- Perennial, often grown as an annual or indoors
- Deer and rabbits
- low
Signes qu'il faut rempoter
- Roots growing out of the drainage holes.
- Water drains through the pot very quickly.
- Plant appears stunted or growth has slowed significantly.
- The plant dries out much faster than usual.
Sécurité
- People
- All parts of the Alocasia plant contain calcium oxalate crystals, which can cause irritation and swelling if ingested or if sap contacts skin.
- Pets
- Toxic to cats and dogs if ingested, causing oral irritation and vomiting.
- Children
- Keep out of reach of children as ingestion can cause oral irritation and swelling.
- Contact allergens
- Sap can cause skin irritation and discomfort for sensitive individuals.
- Airborne allergens
- Does not typically produce airborne allergens.
- Edibility
- This plant is not intended for human consumption.
Comment l'identifier
- Very large, arrowhead-shaped leaves
- Leaves often have prominent veins
- Upright growth habit
- Thick, fleshy stems
- Tropical appearance
- Height
- 0.6 to 3m
- Spread
- 0.6 to 3m
- Leaves
- Green, Dark green, Silver, Variegated, evergreen
- Flowers
- White, Cream, 5 to 15cm
Problèmes courants
- Spider Mites — Tiny pests that feed on plant sap, causing stippling and yellowing of leaves. They thrive in dry conditions.
- Mealybugs — Small, white, cottony insects that suck sap from the plant, weakening it and causing yellowing leaves.
- Root Rot — Caused by overwatering and poor drainage, leading to mushy, brown roots and wilting leaves.
- Yellowing Leaves — Can be caused by overwatering, underwatering, nutrient deficiency, or insufficient light.
La cultiver
- Propagation
- Division, Rhizomes
- When to plant
- Spring, Summer
- Overwintering
- Indoors, maintain consistent warmth and humidity. Reduce watering slightly but do not let the soil dry out completely. If grown outdoors in a suitable climate, protect from frost.
- In containers
- Alocasias do very well in containers, with a minimum pot size of 8 to 10 inches recommended for most common varieties to allow for root growth.
Division of Rhizomes
- Gently remove the Alocasia from its pot.
- Locate the fleshy rhizomes (underground stems) at the base of the plant.
- Carefully divide the rhizomes, ensuring each piece has at least one growth bud.
- Pot each division in its own container with well-draining soil.
- Water lightly and keep in a warm, humid location until new growth appears.
Group Alocasias with other tropical plants that enjoy high humidity and indirect light for a cohesive display.
Bonnes associations
- Ferns — Ferns share similar humidity and light requirements, creating a lush, tropical understory look.
- Calathea — Calatheas also prefer high humidity and indirect light, making them excellent companions for a similar aesthetic.
- Orchids — Many epiphytic orchids can be mounted nearby or grown in similar humid conditions, complementing the tropical feel.
À éloigner de
- Direct Sunlight — Harsh, direct sun can quickly scorch and damage the large, sensitive leaves of Alocasia.
- Cold Drafts — Sudden temperature drops from drafts can stress the plant and cause leaf damage or loss.
- Waterlogged Soil — Constantly wet soil leads to root rot, a common and often fatal issue for Alocasias.
Espèces similaires
- Xanthosoma — Xanthosoma, also known as 'Elephant Ear', has similar large, arrowhead-shaped leaves but often a different growth habit.
- Colocasia — Colocasia, another 'Elephant Ear', typically has more rounded leaves and often prefers wetter conditions.
Science
- Family
- Araceae
- Genus
- Alocasia
- Order
- Alismatales
- Class
- Liliopsida
- Native range
- Southeast Asia and Eastern Australia
- Conservation
- Most Alocasia species are not of conservation concern, but some rare varieties may be threatened by habitat loss.
In its native habitat, Alocasia grows in the humid understory of tropical forests, often near water sources.
- Uses
- Ornamental foliage plant
Au fil des saisons
Repères écologiques
- Salinity
- 2/9
- Soil reaction
- 6/9
- Light
- 7/9
- Temperature
- 8/9
- Moisture
- 7/9
- Nutrients
- 6/9
Taxonomie vérifiée avec le GBIF.
Ce qu'on demande souvent
- What is the best light for Alocasia?
- Bright, indirect light is ideal; avoid direct sunlight, which can scorch the leaves.
- How often should I water my Alocasia?
- Water when the top inch of soil feels dry, ensuring good drainage to prevent root rot.
- Do Alocasias need high humidity?
- Yes, they thrive in high humidity environments, so misting or using a humidifier is beneficial.
- Can Alocasia be grown outdoors?
- Yes, in warm climates with high humidity and protection from direct sun and strong winds.
- Why are my Alocasia leaves drooping?
- Drooping can indicate underwatering, overwatering, or shock from environmental changes.
D'où vient le nom
The genus name 'Alocasia' comes from the Greek word 'aloke', meaning 'hollow', possibly referring to the plant's rhizomes.
Bon à savoir
- Alocasia is also known as the 'Elephant Ear' plant due to its large, ear-shaped leaves.
- Some species are native to tropical rainforests, where they grow in the understory.
- The 'veins' on Alocasia leaves are actually part of its vascular system, transporting water and nutrients.
- Alocasias are a type of aroid, related to plants like Philodendrons and Monsteras.
Ton elephant ear a mauvaise mine ?
Cette page est un guide général. Pocket Botanist diagnostique les problèmes directement à partir d'une photo de ta plante, adapte l'arrosage à sa luminosité et te prévient quand il faut t'en occuper.
Ce guide a été généré par IA et vérifié avec la taxonomie du GBIF. Il s'agit d'informations générales, et non de conseils horticoles ou vétérinaires. Découvre comment nous concevons ces guides.