Sikoku Cobra Lily Plant Care
Arisaema sikokianum Franch. & Sav.
Updated · Sources · How we source care data
Arisaema sikokianum, the Japanese Jack-in-the-pulpit, is a herbaceous perennial plant. An unusual woodland plant noted for its unmistakable smoky-purple base, snow-white cup and large hood with purple, green and white stripes.
Every 7–10 days
Filtered sunlight or partial shade
60–75°F
50–70%
At a glance
How do you care for Sikoku Cobra Lily?
Water Sikoku 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.
What Is the Sikoku Cobra Lily?
Sikoku Cobra Lily (Arisaema sikokianum) belongs to the Araceae family within the Arisaema genus. Sikoku Cobra Lily is also known as Japanese Cobra Lily.
Sikoku Cobra Lily displays a clump-forming perennial growth habit, reaching up to 2 ft tall with a spread of approximately 1 ft. Sikoku Cobra Lily produces unique hooded spathes with a spadix, varying in colors.
Leaf size: approximately 12 inches.
How Often Should You Water a Sikoku Cobra Lily?
Arisaema sikokianum 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 Sikoku Cobra Lily Need?
Sikoku Cobra Lily thrives in filtered sunlight or partial shade. Avoid placing Sikoku 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 Sikoku Cobra Lily Prefer?
Arisaema sikokianum grows best at temperatures of 60–75°F. Sikoku 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 Sikoku Cobra Lily?
Well-draining, rich organic soil with added perlite for aeration. Good drainage is essential for Sikoku Cobra Lily to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Sikoku Cobra Lily?
Feed Sikoku 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 Sikoku 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 Sikoku Cobra Lily?
Sikoku 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 Sikoku 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 Sikoku Cobra Lily?
Sikoku 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 Sikoku Cobra Lily Need?
Sikoku Cobra Lily grows outdoors in USDA Zone 13a. It survives winters down to planting zone 13a. In cooler regions, grow Sikoku Cobra Lily as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 13a
Keep exploring plants
Sikoku 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.
Sikoku 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 sikokianum Franch. & Sav., family Araceae (first published in Enum. Pl. Jap. 2: 507 (1878)) — World Flora Online record, IPNI name record.
- Pet toxicity: Sikoku 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.
- Hardiness zone: USDA Zone 13a, calculated from the plant's minimum temperature.
- 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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