Smooth Solomon's Seal

Polygonatum biflorum

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Smooth Solomon's Seal (Polygonatum biflorum) at Weston Nurseries

Smooth Solomon's Seal

Smooth Solomon's Seal

(Photo courtesy of NetPS Plant Finder)

Height:  5 feet

Spacing:  20 inches

Sunlight:  partial shade  full shade 

Hardiness Zone:  2b

Other Names:  Great Solomon's Seal, P. biflorum var. commutatum


A shade loving perennial featuring arching stems of gracefully hanging clusters of white and green bell flowers in late spring, followed by indigo berries in fall; elegant mid green pinnate leaves turn shades of yellow in fall; perfect for woodland areas

Ornamental Features

Smooth Solomon's Seal features dainty lightly-scented nodding white bell-shaped flowers with creamy white overtones and lime green tips dangling from the stems in late spring. Its glossy pointy pinnately compound leaves emerge chartreuse in spring, turning green in color. As an added bonus, the foliage turns a gorgeous yellow in the fall. The fruits are showy indigo drupes displayed from late summer to late fall.

Landscape Attributes

Smooth Solomon's Seal is a dense herbaceous perennial with a shapely form and gracefully arching foliage. 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 high maintenance plant that will require regular care and upkeep, and is best cleaned up in early spring before it resumes active growth for the season. Gardeners should be aware of the following characteristic(s) that may warrant special consideration;

  • Suckering

Smooth Solomon's Seal is recommended for the following landscape applications;

  • Mass Planting
  • General Garden Use
  • Groundcover
  • Naturalizing And Woodland Gardens

Planting & Growing

Smooth Solomon's Seal will grow to be about 5 feet tall at maturity, with a spread of 24 inches. When grown in masses or used as a bedding plant, individual plants should be spaced approximately 20 inches apart. It has a low canopy with a typical clearance of 2 feet from the ground. It grows at a medium rate, and under ideal conditions can be expected to live for approximately 10 years. As an herbaceous perennial, this plant will usually die back to the crown each winter, and will regrow from the base each spring. Be careful not to disturb the crown in late winter when it may not be readily seen!

This plant does best in partial shade to shade. It prefers to grow in average to moist conditions, and shouldn't be allowed to dry out. It is not particular as to soil pH, but grows best in rich soils. It is highly tolerant of urban pollution and will even thrive in inner city environments. This species is not originally from North America, and parts of it are known to be toxic to humans and animals, so care should be exercised in planting it around children and pets. It can be propagated by division.

Hardiness Zone Plant Height Minimum Sunlight
Massing  Garden  Groundcover  Naturalizing 
Flowers  Fruit  Fall Color 
Ornamental Features