DESCRIPTION: Jacob's Ladder has masses of beautiful spikes of blue flowers rising above fern-like foliage from mid spring to mid summer, which are most effective when planted in groupings. The flowers...
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DESCRIPTION: Jacob's Ladder has masses of beautiful spikes of blue flowers rising above fern-like 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 colour throughout the season. 

BOTANICAL NAME: Polemonium caeruleum
AVERAGE MATURE HEIGHT: 60 cm
AVERAGE MATURE SPREAD: 45 cm
SUN EXPOSURE: Full sun to partial shade
FLOWER COLOUR: Blue
FLOWERING TIME: Late spring
FOLIAGE COLOUR: Green 
COLD HARDINESS: Zone 2 ( Should survive up to -42.7° Celsius )
WATER NEEDS: Average
OTHER FEATURES: Attracts Butterflies, Border, Cut Flower, Deer Resistant, Evergreen

Landscape Attributes

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

Jacob's Ladder is recommended for the following landscape applications:

  • Mass Planting
  • General Garden Use

Planting & Growing

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. It can be propagated by division.

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. 

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