General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Partial or Dappled Shade
Partial Shade to Full Shade
Water Preferences: Mesic
Soil pH Preferences: Slightly acid (6.1 – 6.5)
Neutral (6.6 – 7.3)
Minimum cold hardiness: Zone 4a -34.4 °C (-30 °F) to -31.7 °C (-25 °F)
Maximum recommended zone: Zone 7b
Plant Height: 15 to 24 inches
Plant Spread: 2 feet
Leaves: Deciduous
Flowers: Showy
Flower Color: Blue
Bloom Size: Under 1"
Flower Time: Spring
Uses: Will Naturalize
Wildlife Attractant: Bees
Resistances: Deer Resistant
Rabbit Resistant
Pollinators: Bees
Miscellaneous: Monoecious

Image
Common names
  • Jacob's Ladder
  • Greek Valerian
  • Charity
  • Blue Jacob's-Ladder

Photo Gallery
Location: Stoneham MA
Date: May 10, 2022
Location: KALAMA WA
  • Uploaded by Joy
Location: Nora's Garden - Castlegar, B.C. 
Date: 2016-05-14
 12:21 pm. A beauty with a white centre. Could this be a variety
Location: West shade garden
Date: July
Location: Kalama, wa
  • Uploaded by Joy
Location: Plymouth Nursery, Plymouth, MI
Date: 2012-05-18
Location: Vermont
Date: 2012-05-23
Location: KALAMA WA
  • Uploaded by Joy
Location: KALAMA WA
  • Uploaded by Joy
Location: Plymouth Nursery, Plymouth, MI
Date: 2012-05-18
Location: RHS Harlow Carr, Yorkshire, UK
Date: 2020-06-07
Location: Plymouth Nursery, Plymouth, MI
Date: 2012-05-18
Location: My garden in Belgium
Date: 2009-07-19
Location: My garden in Belgium
Date: 2009-07-19
Location: Columbus, OH
Location: Columbus, OH
Location: KALAMA WA
Date: 2021-04-27
  • Uploaded by Joy
Location: Vermont
Date: 2012-05-23
Location: Stuart, OK
Date: 2017-04-10

Courtesy Gardens in the Wood of Grassy Creek
  • Uploaded by vic
Location: West shade garden
Date: June
Location: KALAMA WA 
Date: 2021-04-19
  • Uploaded by Joy
Location: Plymouth Nursery, Plymouth, MI
Date: 2012-05-18
Location: Plymouth Nursery, Plymouth, MI
Date: 2012-05-18
Location: Plymouth Nursery, Plymouth, MI
Date: 2012-05-18

Photo courtesy of Joy Creek Nursery
Location: Downingtown, Pennsylvania
Date: May in 2010
close-up of plant top in bloom
Location: Silver Spring, MD
Date: 2014-05-09
Location: East border
Date: 2011-06-06
Don't know why they like it under this burning bush, but they gro
This plant is tagged in:
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Comments:
  • Posted by Catmint20906 (PNW WA half hour south of Olympia - Zone 8a) on Aug 25, 2014 4:22 PM concerning plant:
    Jacob's Ladder (Polemonium caeruleum) blooms a lovely clear blue in mid to late spring. It does well in moist, rich soil in part shade. Polemonium caeruleum dislikes hot summer weather, and the foliage often declines in mid to late summer. Bees are attracted to its blooms, particularly sweat bees. Syrphid flies, beneficial insects that feed on aphids, are also attracted to Polemonium caeruleum. The ancient Greeks used this plant as a medicinal herb.
  • Posted by ILPARW (southeast Pennsylvania - Zone 6b) on May 14, 2019 11:16 AM concerning plant:
    This Common Jacob's-Ladder is native to Europe and northern Asia. It is the most common of the genus sold at conventional nurseries. It makes an upright clump. Its odd pinnate oval leaves are 11 to 27 on a whole leaf. The cup-shaped flowers in loose panicle clusters usually are blue, but can also be white or pink. It does not do well in hot and/or dry locations, and the foliage can brown during drought.
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MissMew On May 1, 1999 Obtained plant
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