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Japanese Jack-In-The-Pulpit

Arisaema sikokianum

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Japanese Jack-In-The-Pulpit (Arisaema sikokianum) at Landsburg Landscape Nursery

Arisaema sikokianum in bloom

Arisaema sikokianum in bloom

(Photo courtesy of NetPS Plant Finder)

Plant Height:  8 inches

Flower Height:  16 inches

Spread:  12 inches

Sunlight:  partial shade  full shade 

Hardiness Zone:  2

Other Names:  Dragon Root

Ornamental Features

Japanese Jack-In-The-Pulpit features solitary white trumpet-shaped flowers with burgundy bracts at the ends of the stems in early summer. Its pointy leaves remain green in color throughout the season. The fruit is not ornamentally significant.

Landscape Attributes

Japanese Jack-In-The-Pulpit is an open herbaceous perennial with an upright spreading habit of growth. Its medium texture blends into the garden, but can always be balanced by a couple of finer or coarser plants for an effective composition.

This is a relatively low maintenance plant, and usually looks its best without pruning, although it will tolerate pruning. Deer don't particularly care for this plant and will usually leave it alone in favor of tastier treats. It has no significant negative characteristics.

Japanese Jack-In-The-Pulpit is recommended for the following landscape applications;

  • General Garden Use

Planting & Growing

Japanese Jack-In-The-Pulpit will grow to be about 8 inches tall at maturity extending to 16 inches tall with the flowers, with a spread of 12 inches. It grows at a slow rate, and under ideal conditions can be expected to live for approximately 5 years.

This plant does best in partial shade to shade. It does best in average to evenly moist conditions, but will not tolerate standing water. It is very fussy about its soil conditions and must have rich, acidic soils to ensure success, and is subject to chlorosis (yellowing) of the leaves in alkaline soils. It is quite intolerant of urban pollution, therefore inner city or urban streetside plantings are best avoided, and will benefit from being planted in a relatively sheltered location. Consider applying a thick mulch around the root zone in both summer and winter to conserve soil moisture and protect it in exposed locations or colder microclimates. This species is not originally from North America.

 
 
Hardiness Zone Plant Height Minimum Sunlight Soil pH Preference
Characteristics
Garden 
Applications
Flowers  Plant Form 
Ornamental Features