Safety note: This plant may be toxic to humans and pets. See toxicity details.
Japanese arisaema (Arisaema japonicum) is a distinctive woodland perennial from Japan, featuring a hooded spathe and spadix, arising from a tuber.
At-a-glance light, water, soil, and growing conditions from plant data
Partial shade to dappled sunlight
50% intensity
Avoid direct, harsh sunlight, which can scorch the leaves. Bright, indirect light is ideal.
Consistent moisture during growth, reduced during dormancy
75% intensity
Prefers evenly moist soil; allow top layer to dry slightly between waterings.
Well-drained, humus-rich
50% intensity
Moderate to cool
50% intensity
Prefers temperatures between 15-25°C during the growing season. Can tolerate cooler temperatures and requires a period of dormancy.
Moderate feeding during growth
50% intensity
Use a balanced liquid fertilizer diluted to half strength monthly during spring and early summer.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | Yes 5/5 intensity |
| Toxic for pets | Yes 5/5 intensity |
| Edible | No |
All parts are toxic
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water thoroughly when the top few centimeters of soil feel dry. Arisaema japonicum prefers consistently moist soil, especially during its active growing season.
Reduce watering significantly as the foliage begins to yellow and die back in late summer or fall, allowing the tuber to enter dormancy.
Remove dead or yellowing foliage at the end of the growing season. Cut back the flower stalk after flowering if seed production is not desired. Pruning is mainly for tidiness and to prevent disease.
Ensure tools are clean to avoid introducing pathogens to the plant.
Propagate by division of the corms during dormancy (late fall or early spring) or by sowing fresh seeds in autumn. Seed-grown plants may take several years to reach flowering size.
Corm divisions should be planted at a depth of about 5-10 cm.
Repot the plant every 2-3 years or when the corm outgrows its container. This is best done during dormancy in late fall or early spring. Use a well-draining potting mix.
Ensure the new pot is only slightly larger than the current one to avoid waterlogging.
Identify plants like this with ePlant AI
Snap a photo to get care tips and match similar species on the go.
Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Japanese Arisaema (Arisaema japonicum)
Where Japanese Arisaema (Arisaema japonicum) is found
Density
Tap map to explore
Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Liliopsida |
| Order | Alismatales |
| Family | Araceae |
| Genus | Arisaema |
| Species | Arisaema japonicum |
Similar in genus Arisaema
Answers based on plant encyclopedia data
