Also known as Swamp Jack-In-The-Pulpit
Safety note: This plant may be toxic to humans and pets. See toxicity details.
bog Jack-in-the-pulpit (Arisaema stewardsonii) is a woodland native with striking green and purple spathes, thriving in moist, shaded environments.
At-a-glance light, water, soil, and growing conditions from plant data
Partial Shade
50% intensity
Prefers dappled shade to partial shade. Avoid direct, intense sunlight.
Consistent Moisture
100% intensity
Keep soil consistently moist, mimicking bog conditions. Never let it dry out completely.
Rich, moist to wet, acidic soil
50% intensity
Cool to Moderate
50% intensity
Thrives in cooler temperatures and can tolerate light frost. Protect from extreme heat.
Light Feed
25% intensity
Feed sparingly in spring with a balanced fertilizer or compost. Avoid over-fertilization.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | Yes 4/5 intensity |
| Toxic for pets | Yes 4/5 intensity |
| Edible | No |
All parts of the plant contain calcium oxalate crystals which can cause oral irritation, blistering, and digestive upset.
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Arisaema stewardsonii thrives in consistently moist, bog-like conditions. Water regularly to keep the soil saturated, especially during the growing season.
Avoid allowing the soil to dry out completely, as this can stress the plant. Reduce watering in fall as the plant begins to go dormant.
Minimal pruning is required for Arisaema stewardsonii. Remove any dead or yellowing foliage in late fall after the plant has died back naturally. This helps prevent disease and keeps the plant tidy.
Cut back stems at the soil line once they have completely withered.
Arisaema stewardsonii can be propagated by seed or by division of rhizomes. Seeds require stratification and can take several years to germinate. Division is best done in early spring before new growth begins.
Carefully separate the rhizomes, ensuring each piece has at least one growing point.
Repotting is generally only necessary when the plant outgrows its container or the soil becomes depleted. This is best done in early spring before active growth starts.
Use a well-draining, but moisture-retentive potting mix suitable for bog plants. Ensure the rhizome is planted at the correct depth.
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Monthly activity intensity for bloom and fruit across both hemispheres.
Flowering & fruiting calendar
Flowering & fruiting calendar
Photos of Bog Jack-In-The-Pulpit (Arisaema stewardsonii)
Where Bog Jack-In-The-Pulpit (Arisaema stewardsonii) is found
Density
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Common names and botanical synonyms
Botanical classification
| Rank | Name |
|---|---|
| Kingdom | Plantae |
| Division | Tracheophyta |
| Class | Liliopsida |
| Order | Alismatales |
| Family | Araceae |
| Genus | Arisaema |
| Species | Arisaema stewardsonii |
Similar in genus Arisaema
Answers based on plant encyclopedia data
