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perennial

Common Jacob's Ladder

Polemonium caeruleum

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Common Jacob's Ladder (Polemonium caeruleum) at Stein's Garden & Home

Common Jacob's Ladder flowers

Common Jacob's Ladder flowers

(Photo courtesy of NetPS Plant Finder)

Plant Height:  12 inches

Flower Height:  24 inches

Spacing:  15 inches

Sunlight:  full sun  partial shade 

Hardiness Zone:  2

Garden Stars Perennials

The Garden Stars® Perennial Collection is a complete line of all your traditional perennial favorites with some exciting new varieties too! These perennials are grown by a network of trusted growers to provide you the highest quality plants for your garden. These varieties have been selected for hardiness, compact growth, and consistent, reliable flower color. Perfect for planting in: garden beds, perennial borders, rock, cottage, prairie or woodland gardens, & even pots on the patio!

Ornamental Features

Common Jacob's Ladder has masses of beautiful spikes of blue flowers rising above the foliage from mid spring to mid summer, which are most effective when planted in groupings. The flowers are excellent for cutting. Its ferny pinnately compound leaves remain green in color throughout the season. The fruit is not ornamentally significant.

Landscape Attributes

Common Jacob's Ladder is an herbaceous perennial with tall flower stalks held atop a low mound of foliage. Its relatively fine texture sets it apart from other garden plants with less refined foliage.

This plant will require occasional maintenance and upkeep, and is best cleaned up in early spring before it resumes active growth for the season. Deer don't particularly care for this plant and will usually leave it alone in favor of tastier treats. Gardeners should be aware of the following characteristic(s) that may warrant special consideration;

  • Self-Seeding

Common Jacob's Ladder is recommended for the following landscape applications;

  • Mass Planting
  • General Garden Use

Planting & Growing

Common Jacob's Ladder will grow to be about 12 inches tall at maturity extending to 24 inches tall with the flowers, with a spread of 18 inches. When grown in masses or used as a bedding plant, individual plants should be spaced approximately 15 inches apart. Its foliage tends to remain dense right to the ground, not requiring facer plants in front. It grows at a medium rate, and under ideal conditions can be expected to live for approximately 10 years.

This plant does best in full sun to partial shade. It does best in average to evenly moist conditions, but will not tolerate standing water. It is not particular as to soil type or pH. It is somewhat tolerant of urban pollution. This species is not originally from North America. It can be propagated by division.

 
 
Hardiness Zone Plant Height Minimum Sunlight
Characteristics
Massing  Garden 
Applications
Flowers  Texture  Plant Form 
Ornamental Features