How to Grow Arisarum
Arisarum
Arisarum vulgare
flowerArisarum is a small tuberous perennial in the Araceae family, native to the Mediterranean region. It produces distinctive arrow-shaped leaves and unusual hooded spathe flowers that resemble tiny cobra heads in shades of brown, purple, and cream. The plant is grown primarily as an ornamental curiosity in shade gardens and containers.
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Example Arisarum timeline · Pittsburgh, PA (Zone 6b)
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Plant Arisarum
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Arisarum blooms
Mid-to-late summerBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 8-11; can be grown in containers in colder zones and overwintered indoors
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Get my Arisarum timeline →Growth Stages
Dormancy/Winter Rest
Late summer through early spring (4-5 months)Tubers lie dormant underground with no visible growth. Foliage has completely died back
Keep soil dry to very slightly moist. Protect from freezing temperatures in cold climates by moving pots indoors or mulching heavily. Do not fertilize
Emergence & Vegetative Growth
3-4 weeksArrow-shaped leaves emerge from soil in early spring, growing 3-6 inches tall. Plant establishes leaf rosette
Begin watering as growth appears. Apply balanced liquid fertilizer monthly at half strength. Ensure good drainage and partial shade. Keep consistently moist but not wet
Flowering
4-6 weeks (spring, typically March-April)Distinctive hooded spathe flowers appear among or just above the foliage, typically in shades of brown, purple, cream, or marbled combinations. Flowers 1-2 inches tall
Maintain consistent moisture without waterlogging. Continue light fertilizing. Flowers may have a musty or carrion-like scent that attracts flies for pollination. Do not disturb
Seed Development & Senescence
4-8 weeks (late spring through summer)Flowers fade and foliage begins to yellow and wilt. Small red or orange berries may form if pollinated. Leaves gradually die back completely
Allow foliage to die back naturally—do not remove prematurely. Reduce watering as plant enters dormancy. Stop fertilizing. Leave seed berries on plant if present for self-seeding potential
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Inspect regularly; spray with insecticidal soap or neem oil if found. Remove heavily infested leaves
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Increase humidity around plants; spray with water to dislodge; use miticide if severe
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and
Use copper tape around pots; hand-pick in evening; apply slug pellets or beer traps around planting area
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Ensure excellent drainage; reduce watering frequency; remove affected tubers immediately; apply sulfur dust to healthy tubers
Uses
Shade Garden Curiosity
OrnamentalArisarum serves as a unique sculptural accent in woodland shade gardens and alpine troughs, valued for its architectural hooded flowers that resemble tiny cobra heads and attract flies through their musty scent. [source]
Container & Indoor Cultivation
HouseholdExcellent for alpine containers, terrariums, and houseplant collections in cool locations, allowing gardeners in cold climates to grow this Mediterranean native indoors with proper dormancy management. [source]
Pollinator Attraction
WildlifeThe distinctive brown and purple spathe flowers emit a musty, carrion-like scent that specifically attracts small flies and other insect pollinators, supporting native pollinator populations in garden ecosystems. [source]
Botanical Interest & Collection
CraftPopular among serious gardeners and plant collectors interested in unusual or rare aroids, serving as a conversation piece and educational example of Arum family morphology and Mediterranean shade ecology. [source]
Harvest Tips
Not applicable—Arisarum is ornamental only. Enjoy flowers in spring; allow seed berries to dry on plant if pollinated and self-sow; collect seeds in late spring/early summer and sow immediately in gritty seed compost. Divide tubers in late summer after foliage dies back but before dormancy deepens
Fun Facts
- 🌱 The hooded spathe flower's shape and carrion scent create a 'trap' for small flies—insects enter seeking food, trigger the spadix, and escape covered in pollen, effectively pollinating the plant while being rewarded with a small meal
- 🌱 Arisarum tubers can persist in soil for many years and can spread slowly through underground tuber division, making established colonies capable of lasting for decades with minimal care
- 🌱 The plant's Mediterranean origin means it thrives in the cool, moist winters and dry summers of its native habitat—conditions that can be challenging to replicate outside its native range, requiring deliberate dormancy management
Gardening Terms
New to gardening? Learn about terms used in this guide:
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