Bulb · Araceae
Elephant Ear
Colocasia esculenta
Set it in rich, ever-moist soil and full sun, and elephant ear gives a space the instant drama of the tropics all season.
Full sun
45–86°F · 7–30°C
USDA 8–11
3–6 ft · 0.9–1.8 m
Overview
Few plants reset the mood of a space the way elephant ear does. With heart-shaped leaves that rise past 3 feet (91 cm) on tall stalks, a single clump turns a quiet pond edge or a damp border into something that feels like a retreat. It belongs to the arum family and rises from a corm, the same plant that reaches the table as taro.
Think of it as a statement piece for warm, wet corners. Across its hardy range of zones 8 to 11 it anchors a planting year after year, while colder homes treat it as a seasonal flourish or move it indoors when the weather turns. Sited at the water's edge, where many plants would falter, it gives a garden the lush, layered look of a tropical escape.
It pairs best with a routine that keeps it well watered and warm. Soak the soil, feed it through the season, and shelter it from rough wind, and it rewards the room with a bold sweep of foliage that pulls the eye. Keep one thing in mind when placing it: every raw part is toxic, so reserve it for spots that stay clear of pets and children.
Care
The short version: plant it in rich soil kept constantly moist, give it full sun to part shade and steady warmth, feed it monthly through spring and summer, and lift the corms before frost wherever it cannot overwinter outdoors.
Light
Elephant ear comes into its own in full sun, though it keeps its composure in part sun or part shade. Strong light brings the fullest, most striking leaves, while in a hot setting a little afternoon shade keeps the foliage from scorching and holds its good looks through summer.
Water
This is where the plant asks the most of a routine. It wants constantly wet, boggy soil and should never dry out, and it settles in beautifully as a pond marginal in up to 6 inches of standing water. The sunnier and warmer the spot, the more water it draws, so plan its placement around easy access to moisture.
Soil
Give it fertile, humus-rich clay or loam that stays moist, the kind of ground most plants would find too wet to enjoy. Its ease with the occasional flood is exactly what lets it hold a starring place at a pond edge.
Temperature
It favors warmth, settling between about 45°F to 86°F (7°C to 30°C), and it eases off as the air cools. With no frost tolerance, the first freeze closes its season above ground, so its presence is a warm-weather one wherever winters bite.
Humidity
Drawn from steamy tropical ground, it thrives on high humidity. Moist air keeps the broad leaves looking fresh at the edges, one more reason it sits so naturally as part of a waterside scene.
Feeding
Through spring and summer, while it builds its display, offer a balanced fertilizer once a month. Rich soil and steady feeding are what sustain the oversized leaves that give the plant its impact.
Pruning
Upkeep is light and mostly about keeping it tidy for the eye. Remove tattered, yellowing, or frost-damaged leaves as they appear, and shelter the plant from strong wind, which tears the large, soft foliage and spoils the look.
Repotting
Divide and repot the corms in spring as the clumps fill their space. Crowded corms, shrinking leaves, or a clump pushing up out of the pot signal that it has outgrown its setting and is ready to be split.
Size & spacing
A mature clump commands 3 to 6 feet (91 to 183 cm) in height and the same in spread, so it earns a generous spot. Set plants far enough apart that the huge leaves can open fully and keep the composition from looking crowded.
When to plant
Elephant ear keeps to the rhythm of the warm season and bows out at the first cold. Set the corms in mid-spring once the soil has warmed and frost has passed, let the foliage build into its full presence through summer, then lift the corms before the first fall frost in any climate where the plant cannot stay outside.
Northern hemisphere
Southern hemisphere
Typical months for a temperate climate: start earlier in warm zones, later where spring frosts linger.
- Plant: Plant corms in mid-spring after the soil warms and frost danger has passed
- Harvest: Rarely flowers in cultivation (yellowish-white spathe); grown as a foliage plant
Hardiness
USDA hardiness zones: 8–11
Temperature: down to -12°C
Troubleshooting
An easy plant with few pests, elephant ear rarely asks for more than a watchful eye, and its troubles trace back to dryness or cold. The leaves tell the story before anything else does. Match what you see below and adjust the setting before the display suffers.
Browning, scorched leaf edges and wilting leaves
This is the look of a bog plant left thirsty. Elephant ear wants its soil wet at all times, and in full hot sun it dries out fast and the big leaves crisp at the edges, dulling the display. Water deeply, mulch to hold the moisture, and give it afternoon shade where summers run harsh.
Fix:
- Water deeply and keep soil consistently wet
- Mulch to retain moisture
- Provide afternoon shade in hot climates
Leaves collapse and turn black after a cold night
This is frost damage, and it arrives the moment a tropical plant meets freezing air. The first fall frost blackens the foliage overnight and the show is over for the season. Cut back the ruined leaves, then lift the corms and store them somewhere cool and dry above 45°F (7°C) until spring.
Fix:
- Cut back damaged foliage
- Dig corms after first frost and overwinter in a cool, dry place above 45°F
Toxicity
For all its presence in a space, this is a plant to place with care. Its leaves, stems, and corm hold insoluble calcium oxalate crystals that sting and swell the mouth and throat the moment they are chewed, and the swelling can be serious. It poses the same risk to cats, dogs, horses, and people, and only the cooked corm becomes edible taro, so situate the raw plant well away from pets, livestock, and children.
Toxic to
Cats · Dogs · Horses · Rabbits · Livestock · Birds · People
Cats Moderate
A cat that bites a leaf gets a fast, painful sting in the mouth, with heavy drooling, pawing at the face, a swollen mouth and tongue, vomiting, and trouble swallowing to follow.
Dogs Moderate
The crystals burn a dog's mouth on contact, so most spit the plant out quickly, and drooling, retching, a swollen tongue, and difficulty swallowing tend to come next.
Horses Moderate
A grazing horse takes the same searing of the mouth and lips, with drooling and a reluctance to eat as the swelling sets in.
Rabbits Toxic
The same raphides irritate a rabbit's mouth and gut, and a small animal has little margin, so keep elephant ear well out of any rabbit's reach.
Livestock Toxic
Cattle, goats, and sheep that browse the raw foliage suffer painful mouth swelling and digestive upset, and they may refuse food while the mouth recovers.
Birds Toxic
A curious bird that nibbles the leaves gets the same caustic burn to the mouth and crop, so the whole raw plant is best treated as off limits.
People Caution
Raw, every part stings the mouth and throat and can swell the airway, so this is no salad green. The corm becomes the edible taro only after thorough cooking in salted water, and cooked properly it is safe while raw it is not.
Wear gloves when dividing corms; plant sap and raphides can irritate skin and mucous membranes.
Helpline numbers
United States
ASPCA Animal Poison Control: (888) 426-4435 (fee applies)
Poison Control: (800) 222-1222
Canada
Poison Centres: 1-844-764-7669
Varieties
The elephant ears most prized for styling are the dark, dramatic selections that bring weight and contrast to a planting. These are the names that come up most when a space calls for something bolder.
'Black Magic'
Its dusky purple-black leaves on matching dark stems lend a near-charcoal weight that grounds a planting.
'Illustris'
Its dark, almost black leaves laced with bright green veins bring a graphic contrast that reads from across a space.
'Black Coral'
Its glossy, ruffled foliage in deep blue-black catches the light and adds a polished, sculptural note.
'Mojito'
Its green leaves flecked and splashed at random with dark purple-black give a lively, no-two-alike effect that keeps a grouping interesting.
How to propagate
Filling out a planting costs little, since elephant ear multiplies through its own corms. A single established clump is usually all you need to extend the look across a border or a row of containers.
DivisionEasy
Spring, as new growth begins · A few weeks to establish in warm, moist conditions
The simplest way to extend a planting is to split a clump in spring just as new growth begins. Ease the corms apart, pot them in rich, peaty mix, and keep them constantly moist. In warm conditions they settle into their new spots within a few weeks.
Bulbs & cormsEasy
Plant corms in mid-spring after frost · Sprouts and establishes over several weeks once soil is warm
Stored corms can also be set out in mid-spring, once frost has passed and the soil is warm, after which they sprout and root over several weeks. Where winters fall below the plant's hardy range, lift the corms each fall and keep them above 45°F (7°C) through the cold months.
Myths
Elephant ear and taro are poisonous, so they can never be eaten.
Raw, the plant is genuinely toxic, since insoluble calcium oxalate raphides burn the mouth. The corm, though, is a staple across the tropics and the taro behind Hawaiian poi, once it has been cooked through in salted water. Cooking is what makes it safe to eat, while raw it stays poisonous.