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PlantFiles: Creeping Jacob's Ladder, Greek Valerian
Polemonium reptans 'Blue Pearl'

Family: Polemoniaceae (po-le-moh-nee-AY-see-ee) (Info)
Genus: Polemonium (po-le-MOH-nee-um) (Info)
Species: reptans (REP-tanz) (Info)
Cultivar: Blue Pearl

4 members have or want this plant for trade.


12-18 in. (30-45 cm)

12-15 in. (30-38 cm)

USDA Zone 3a: to -39.9 C (-40 F)
USDA Zone 3b: to -37.2 C (-35 F)
USDA Zone 4a: to -34.4 C (-30 F)
USDA Zone 4b: to -31.6 C (-25 F)
USDA Zone 5a: to -28.8 C (-20 F)
USDA Zone 5b: to -26.1 C (-15 F)
USDA Zone 6a: to -23.3 C (-10 F)
USDA Zone 6b: to -20.5 C (-5 F)
USDA Zone 7a: to -17.7 C (0 F)
USDA Zone 7b: to -14.9 C (5 F)
USDA Zone 8a: to -12.2 C (10 F)
USDA Zone 8b: to -9.4 C (15 F)
USDA Zone 9a: to -6.6 C (20 F)
USDA Zone 9b: to -3.8 C (25 F)

Sun Exposure:
Light Shade

Unknown - Tell us

Bloom Color:

Bloom Time:
Mid Spring
Late Spring/Early Summer

Grown for foliage

Other details:
Average Water Needs; Water regularly; do not overwater

Soil pH requirements:
Unknown - Tell us

Patent Information:
Unknown - Tell us

Propagation Methods:
By dividing the rootball
From seed; direct sow outdoors in fall

Seed Collecting:
Unknown - Tell us

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2 positives
1 neutral
No negatives

Gardeners' Notes:

Positive bigyard On Aug 5, 2011, bigyard from Rochester, MN wrote:

no problems so far, healthy in well drained soil and no special overwintering was provided (year 1). Has not required watering outside of the unusually heavy rain we've had tjhis spring/summer 2011. It is blooming again at present. (end July/august) Nice!

Positive ladychroe On May 4, 2008, ladychroe from Bridgewater, NJ wrote:

Wonderful ferny foliage all year, and a great companion plant for tulips. The delicate, abundant flowers are a medium blue-violet. They have a nice fragrance, but I only noticed it when I brought some indoors. Gets bigger every year, but has not shown any invasive tendencies in the three year that I'm had them.

This is a very good cutting flower and makes nice filler in tulip bouquets.

Mine grow in shade with maybe 2 hours of morning sun. The soil is dryish red clay. I found that they needed a fair amount of moisture while getting established, but did fine with just rainfall after that, even with a large greedy maple tree nearby.

Cut back by 1/2 for some rebloom.

Neutral berrygirl On Mar 22, 2007, berrygirl from Braselton, GA (Zone 7b) wrote:

POLEMONIUM Reptans 'Blue Pearl' - Short 12" - Plant 12" apart. A great improvement over the old 'Jacob's Ladder'. It is a long lived plant with blue flowers and the divided foliage attractively arched. Very nice at the base of small shrubs or bush roses. The flower's fragrance draws people to wherever it is planted. Protect from late day sun.

General Information:
Avoid dry soil with full sun, fragrant, best selections for the coldest areas (zones 3&4), not for Gulf states.


This plant has been said to grow in the following regions:

Tuscumbia, Alabama
Des Moines, Iowa
Hebron, Kentucky
Pinconning, Michigan
Bridgewater, New Jersey
Port Washington, New York
Grand Forks, North Dakota
Williamsburg, Ohio
West Chester, Pennsylvania
Austin, Texas
Saint Albans, Vermont
Leesburg, Virginia

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