Photo by Melody

PlantFiles: Jack-in-the-Pulpit
Arisaema yamatense subsp. sugimotoi

Family: Araceae (a-RAY-see-ee) (Info)
Genus: Arisaema (air-uh-SEE-muh) (Info)
Species: yamatense subsp. sugimotoi

One member has or wants this plant for trade.


12-18 in. (30-45 cm)

12-15 in. (30-38 cm)

USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)

Sun Exposure:
Light Shade
Partial to Full Shade
Full Shade

Seed is poisonous if ingested

Bloom Color:
Pale Green
Dark Purple/Black

Bloom Time:
Late Winter/Early Spring

Grown for foliage

Other details:
Requires consistently moist soil; do not let dry out between waterings
This plant may be considered a protected species; check before digging or gathering seeds
Suitable for growing in containers

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From seed; winter sow in vented containers, coldframe or unheated greenhouse

Seed Collecting:
Remove fleshy coating on seeds before storing
Wear gloves to protect hands when handling seeds

Click thumbnail
to view:

By growin
Thumbnail #1 of Arisaema yamatense subsp. sugimotoi by growin

By aureola
Thumbnail #2 of Arisaema yamatense subsp. sugimotoi by aureola


1 positive
No neutrals
No negatives

Gardeners' Notes:

Positive aureola On Jul 28, 2012, aureola from Webster, ME wrote:

I have several varieties of volunteer Arisaema on my 3/4 acre property. The plants are quite hardy and some grow to 24" tall, while others are the more standard 18", and others remain quite small. They transplant easily when needed. They grow in both partial shade and deep shade, and in very wet to very dry conditions. The varieties differ both in size and in the color of their striped spathes (e.g., green and white stripes, burgundy and ivory stripes). I'd like to know more about the different varieties, particularly their botanical names.


This plant has been said to grow in the following regions:

Dover Foxcroft, Maine
Orono, Maine
Lonaconing, Maryland
Dracut, Massachusetts
Columbiaville, Michigan
Grand Rapids, Michigan
Saint Paul, Minnesota
Salem, New Hampshire
Englishtown, New Jersey
Chichester, New York
Allentown, Pennsylvania
Doylestown, Pennsylvania
North Smithfield, Rhode Island
Callao, Virginia
Hood, Virginia
Racine, Wisconsin

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