Arisaema Species, Cobra Lily, Jack in the Pulpit, Japanese Cobra Lily
Arisaemaringens

Family: Araceae (a-RAY-see-ee)
Genus: Arisaema (air-uh-SEE-muh)
Species: ringens (RIN-jens)

Synonym:Arisaema ringens var. glaucescens

Synonym:Arisaema ringens var. sieboldii

Synonym:Arisaema ringens var. praecox

Category
Bulbs
Perennials
Ponds and Aquatics

Water Requirements
Average Water Needs; Water regularly; do not overwater

Sun Exposure
Sun to Partial Shade
Light Shade
Partial to Full Shade

Foliage
Grown for foliage
Herbaceous
Good Fall Color
Textured
Veined
Velvet/Fuzzy

Foliage Color
Dark/Black

Height
18-24 in. (45-60 cm)
24-36 in. (60-90 cm)

Spacing
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)

Where to Grow

Danger
Parts of plant are poisonous if ingested

Bloom Color
Chartreuse (yellow-green)
Medium Purple
Maroon/Burgundy

Bloom Characteristics

Bloom Size

Bloom Time
Mid Spring
Late Spring/Early Summer

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)
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