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Arisaema Species, Cobra Lily, Jack-in-the-Pulpit

Arisaemaiyoanum

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Family
Araceae (a-RAY-see-ee)
Info
Genus
Arisaema (air-uh-SEE-muh)
Info
Species
iyoanum (ee-oh-AH-num)
Info
Synonym
Arisaema iyoanum subsp. nakaianum
Arisaema iyoanum var. nakaianum
Arisaema nakaianum
Sun Exposure
Partial to Full Shade
Foliage
Grown for foliage
Herbaceous
Good Fall Color
Textured
Veined
Velvet/Fuzzy
Height
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)
Spacing
12-15 in. (30-38 cm)
15-18 in. (38-45 cm)
18-24 in. (45-60 cm)
Hardiness
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
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)
Danger
Parts of plant are poisonous if ingested
Bloom Color
Chartreuse (yellow-green)
White/Near White
Bloom Time
Mid Spring
Late Spring/Early Summer
Other Details
Category
Bulbs
Perennials
Ponds and Aquatics
Water Requirements
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings
Foliage Color

Unknown - Tell us

Where to Grow

Unknown - Tell us

Bloom Characteristics

Unknown - Tell us

Bloom Size

Unknown - Tell us

Other details

Unknown - Tell us

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)
From seed; direct sow outdoors in fall
From seed; winter sow in vented containers, coldframe or unheated greenhouse
From seed; stratify if sowing indoors
Seed Collecting
Allow pods to dry on plant; break open to collect seeds
Remove fleshy coating on seeds before storing
Unblemished fruit must be significantly overripe before harvesting seed; clean and dry seeds
Wear gloves to protect hands when handling seeds
Seed does not store well; sow as soon as possible
Regional
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