Cyrtosperma Species

Cyrtospermajohnstonii

Family
Araceae (a-RAY-see-ee)
Genus
Cyrtosperma (sir-toh-SPER-muh)
Species
johnstonii (jon-STONE-ee-eye)
Synonym
Alocasia johnstonii
Sun Exposure
Light Shade
Foliage
Grown for foliage
Good Fall Color
Height
4-6 ft. (1.2-1.8 m)
Hardiness
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
Dark Purple/Black
Bloom Time
N/A
Other Details
Category
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
Propagation Methods
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From herbaceous stem cuttings
By serpentine layering
Seed Collecting
Regional

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

Big Pine Key, Florida

De Leon Springs, Florida

Lakeland, Florida

Miami, Florida

Featured Videos

Gardener's Notes:

1
positive
1
neutral
0
negative
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San Leandro, CA (Zone 9b) | December 2019 | neutral

Per Irene Ngoo at Min's Garden @tropicaljungle in Singapore:
"A flush of new leaves on this more than 20-year-old Cyrtosperma john...Read More

M
Bartow, FL (Zone 9a) | December 2007 | positive

This erect aroid has green saggitate leaves with red veins and a spiny petiole. It is a bog plant needing constant moisture and organic ...Read More

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