Photo: no rights reservedCC0 1.0via iNaturalist
Japanese Cobra Lily Plant Care
Arisaema heterophyllum Blume
Updated · Sources · How we source care data
This plant's most distinctive feature is its striking hooded flower, resembling a cobra poised to strike. Originating from the forests of the Himalayas, Arisaema heterophyllum is highly sought after by plant collectors for its unique and exotic appearance, making it a prized addition to any botanical collection.
Every 7–10 days
Filtered sunlight or partial shade
60–75°F
50–70%
At a glance
How do you care for Japanese Cobra Lily?
Water Japanese Cobra Lily every 7–10 days, letting the top layer of soil dry out between waterings, and give it filtered sunlight or partial shade. It prefers temperatures of 60–75°F (16–24°C) and 50–70% humidity. Fertilize it every 6 months during the growing season. It is reported as toxic to pets, so keep it out of reach of pets.
Where Is the Japanese Cobra Lily Native To?
What Is the Japanese Cobra Lily?
Japanese Cobra Lily (Arisaema heterophyllum) belongs to the Araceae family within the Arisaema genus. Japanese Cobra Lily is native to East Asia.
Japanese Cobra Lily displays a clump-forming perennial growth habit, reaching up to 2 ft tall with a spread of approximately 1 ft. Japanese Cobra Lily produces unique hooded spathes with a spadix, varying in colors.
Leaf size: approximately 12 inches.
How Often Should You Water a Japanese Cobra Lily?
Arisaema heterophyllum requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–10 days
Let soil partially dry between waterings
What Light Does the Japanese Cobra Lily Need?
Japanese Cobra Lily thrives in filtered sunlight or partial shade. Avoid placing Japanese Cobra Lily in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Filtered sunlight or partial shade
What Temperature and Humidity Does the Japanese Cobra Lily Prefer?
Arisaema heterophyllum grows best at temperatures of 60–75°F. Japanese Cobra Lily prefers humidity levels of 50–70%. A pebble tray or humidifier helps maintain adequate moisture around the plant.
Temperature
60–75°F
Humidity
50–70%
What Soil Mix Works Best for a Japanese Cobra Lily?
Well-draining, rich organic soil with added perlite for aeration. Good drainage is essential for Japanese Cobra Lily to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Japanese Cobra Lily?
Feed Japanese Cobra Lily every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Japanese Cobra Lily?
Repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Japanese Cobra Lily?
Japanese Cobra Lily can be propagated through division of offsets, tuber division, seeds. Similar propagation techniques also apply to amur jack-in-the-pulpit plant care, which shares the same genus.
Is the Japanese Cobra Lily Toxic to Pets and Children?
Toxic (caution)
Reported as toxic in our plant data. Not verified by the ASPCA.
Toxic if ingested, may cause skin irritation
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Japanese Cobra Lily?
Japanese Cobra Lily is susceptible to spider mites, aphids, scale insects. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Japanese Cobra Lily Need?
Japanese Cobra Lily grows outdoors in USDA Zone 5a – 8b. It survives winters down to planting zone 5a. Japanese Cobra Lily is native to East Asia.
Hardiness Zone
Zone 5a – 8b
Keep exploring plants
Japanese Cobra Lily is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Arisaema genus — compare its care with other Arisaema species on PlantoScan.
Arisaema is part of the Araceae plant family — browse all Araceae genera and species.
Japanese Cobra Lily contains compounds toxic to pets — learn which other species to keep from pet-toxic plants.
More Arisaema Species
Other Arisaema species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Arisaema heterophyllum Blume, family Araceae (first published in Rumphia 1: 110 (1836)) — World Flora Online record, IPNI name record.
- Pet toxicity: Japanese Cobra Lily is reported as toxic to pets in our plant data (not verified by the ASPCA), so treat it with caution. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Photo: Public domain, CC0 1.0, iNaturalist — original.
- Hardiness zone: USDA Zone 5a – 8b, estimated from the plant's typical growing conditions.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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