Skullcap
Arisaema serratumfam. Araceae
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Pl. E130 — Arisaema serratum
Arisaema serratumArisaema serratumArisaema serratumArisaema serratumArisaema serratumArisaema serratumArisaema serratumArisaema serratumArisaema serratumArisaema serratumArisaema serratumArisaema serratumArisaema serratumArisaema serratum
IOverview
Overview
Arisaema serratum, commonly known as Japanese arum or sawtooth jack-in-the-pulpit, is a perennial plant native to Japan, Korea, the Kuril Islands, and Primorye. It thrives in moist environments with partial sun to full shade and prefers light (sandy) to medium soil types. This plant can grow up to 0.9 meters tall and is known for its edible leaves and roots. One distinctive feature of A. serratum is its sawtooth-shaped leaf margins, which give it a unique appearance in the garden or natural setting. Its hardiness ranges from zones 4-8, making it suitable for gardens in cooler climates.
Quick answers
What is Skullcap?
Arisaema serratum, commonly known as Japanese arum or sawtooth jack-in-the-pulpit, is a perennial plant native to Japan, Korea, the Kuril Islands, and Primorye. It thrives in moist environments with partial sun to full shade and prefers light (sandy) to medium soil types.
Growingconditions · propagation · uses
VCultivation
Cultivation
Arisaema serratum thrives in partial to full shade and prefers moist, well-draining soil of medium consistency. It is a perennial that grows up to 0.9 meters tall and is hardy in zones 4-8. For optimal growth, provide the plant with light to partial sun exposure. Water regularly to maintain moisture levels. Propagate through division or seed sowing in spring. The edible parts include leaves and roots, making this a versatile addition to gardens and culinary uses.
Light
Full sun, Partial sun/shade, Full shade
Water
Moist
Soil
Light (sandy), Medium
Hardiness
4-8
Life cycle
Perennial
Mature size
0.9 m tall
For first-time growers
How to grow Skullcap for the first time
8steps
Start with a simple, light-loving spot in your garden for Skullcap.
- 1
What you'll need
Arisaema serratum bulbs or seeds, potting soil, containers if planting in pots.
- 2
Best time to plant
Plant in spring after the last frost or in fall before the first freeze.
- 3
Soil and container prep
Use a well-draining mix with light sand for better drainage. Ensure containers have holes at the bottom.
- 4
Sowing or transplanting
Plant bulbs 5-10 cm deep in soil, spacing them about 20 cm apart. For seeds, sow shallowly and keep moist.
- 5
First two weeks
Keep the soil consistently moist but not waterlogged. Provide partial shade to avoid scorching.
- 6
Ongoing care
Water when the top inch of soil feels dry. Mulch around plants in winter for protection in colder zones.
- 7
Harvest or pruning
Prune dead foliage after flowering to maintain a neat appearance and encourage new growth.
- 8
Common mistakes
Overwatering, planting too deep, neglecting mulching in cold regions.
VIEdible & utility
Edible & utility
Edible parts:LeavesRoot
Edible uses: The leaves and root of Arisaema serratum are edible. The leaves can be eaten raw or cooked, while the root is typically prepared by boiling before consumption. Both parts are often used in traditional Asian cuisine.
Contextrange · companions · related
VIIDistribution
4 native · 1 introduced
Distribution
4 native · 1 introducedDistribution across1 continent· 4 native· 1 introduced
Asia3 regions
native (2)JapanSouth Korea
introduced (1)China
Broader regions
native:Kuril Is., Primorye
IXSpecimen gallery
1 image
Specimen gallery
1 imageXSee also
8 related
See also
8 relatedPlants you might compare or use together — scored by shared family (Araceae), common use cases, and growing requirements.
same family · Araceae
Botanical relatives — often share phytochemistry + growing needs.
XI
Explore further
Companion planting
Compare with similar plants
Growing zone
XII
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