Colocasia Species, Black Taro, Black Stem Elephant Ear, Violet Stemmed Taro

Colocasiaantiquorum

Family
Araceae (a-RAY-see-ee)
Genus
Colocasia (kol-oh-KAY-see-uh)
Species
antiquorum (an-ti-KWOR-um)
Synonym
Colocasia fontanesii
Colocasia gaoligongensis
Colocasia gongii
Colocasia lihengiae
Colocasia tonoimo
Sun Exposure
Light Shade
Foliage
Herbaceous
This plant is resistant to deer
Textured
Height
6-8 ft. (1.8-2.4 m)
Spacing
15-18 in. (38-45 cm)
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
Hardiness
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
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)
Danger
Parts of plant are poisonous if ingested
Bloom Color
Bright Yellow
Bloom Time
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Blooms repeatedly
Other Details
Category
Bulbs
Ponds and Aquatics
Tropicals and Tender Perennials
Water Requirements
Requires consistently moist soil; do not let dry out between waterings
Very high moisture needs; suitable for bogs and water gardens
Foliage Color
Where to Grow
Can be grown as an annual
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
Patent Information
Non-patented
Propagation Methods
By dividing rhizomes, tubers, corms or bulbs (including offsets)
Seed Collecting
Regional

This plant is said to grow outdoors in the following regions:

Tuskegee, Alabama

Vincent, Alabama

Conway, Arkansas

Brea, California

Clayton, California

Fairfield, California

Hayward, California

Paradise, California

Salinas, California

San Diego, California

San Francisco, California

San Jose, California

San Leandro, California

Van Nuys, California

Gainesville, Florida

Hollywood, Florida

Saint Petersburg, Florida

Tampa, Florida

Honomu, Hawaii

Moline, Illinois

Hattiesburg, Mississippi

Emerald Isle, North Carolina

Raleigh, North Carolina

Cincinnati, Ohio

Oklahoma City, Oklahoma

Vieques, Puerto Rico

Columbia, South Carolina

Ladys Island, South Carolina

Prosperity, South Carolina

Sumter, South Carolina

Desoto, Texas

Houston, Texas

La Porte, Texas

Mansfield, Texas

Pflugerville, Texas

San Antonio, Texas

Renton, Washington

White Center, Washington

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Featured Videos

Gardener's Notes:

5
positives
0
neutral
0
negative
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W
Battle Ground, WA (Zone 8b) | September 2008 | positive

This has been a banner year for all of my elephant ears, but particularly the black stem -- in early spring it spawned an offshoot that's...Read More

F
Honomu, HI (Zone 11) | December 2004 | positive

Our black taro has done extremely well and we mix it into our landscaping. It does not necessarily have to live in wet, boggy areas. We...Read More

S
Moline, IL | October 2004 | positive

I'm from Zone 5, and my Black Stem was huge, and a great conversation plant. It had many babies. For my zone I cut it back to where the...Read More

T
T
Fort Worth, TX (Zone 7b) | October 2004 | positive

We have this Taro growing in our pond. Well, it used to grow in our waterfall, then it took over. What creeped outside the falls grew int...Read More

T
T
Murfreesboro, TN (Zone 7a) | August 2002 | positive

Has been a nice addition to my bog garden this year. Not quite as robust-growing as the plain green Taro, but the stem color is interesting.

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Featured
Milkweed Aphid
(Aphis nerii)
Black Oystercatcher
(Haematopus bachmani)