Photo by Melody

PlantFiles: Upright Elephant Ear, Giant Taro, Wild Taro
Alocasia macrorrhizos 'Black Stem'

Family: Araceae (a-RAY-see-ee) (Info)
Genus: Alocasia (a-loh-KAY-see-uh) (Info)
Species: macrorrhizos (mak-roh-RY-zos) (Info)
Cultivar: Black Stem

Synonym:Alocasia macrorrhiza
Synonym:Arum indicum
Synonym:Colocasia indica

3 members have or want this plant for trade.

Tropicals and Tender Perennials

12-15 ft. (3.6-4.7 m)

8-10 ft. (2.4-3 m)

USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Partial to Full Shade

All parts of plant are poisonous if ingested

Bloom Color:

Bloom Time:
Blooms all year

Grown for foliage

Other details:
Requires consistently moist soil; do not let dry out between waterings
Very high moisture needs; suitable for bogs and water gardens

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:
Unknown - Tell us

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By mystic
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By mystic
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By sparky_repoman
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1 positive
No neutrals
No negatives

Gardeners' Notes:

Positive sparky_repoman On Sep 27, 2009, sparky_repoman from Corydon, KY wrote:

I love this plant. When I first got it, it was a sad little black stemmed bulb, with only two half burnt leaves. I put it on the porch at first, half day of sun. As I realized this plant loves the sunshine, I moved it to the yard out by the Avocado and the Hibiscus and it is really thriving. During really dry times, no rain, I water this plant with filtered water or saved rain water. I have not fertilized this plant since July.


This plant has been said to grow in the following regions:

Navarre, Florida
Orlando, Florida
Festus, Missouri

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