Polemonium, Variegated Jacob's Ladder 'Blanjou'

Polemoniumcaeruleum

Family
Polemoniaceae (po-le-moh-nee-AY-see-ee)
Genus
Polemonium (po-le-MOH-nee-um)
Species
caeruleum (see-ROO-lee-um)
Synonym
Sun Exposure
Sun to Partial Shade
Light Shade
Foliage
Grown for foliage
Herbaceous
Good Fall Color
Height
18-24 in. (45-60 cm)
Spacing
18-24 in. (45-60 cm)
Hardiness
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)
Bloom Color
Dark Blue
Bloom Time
Late Spring/Early Summer
Mid Summer
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
Patent Information
Patented
Propagation Methods
By dividing the rootball
Seed Collecting
Properly cleaned, seed can be successfully stored
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
Regional

This plant is said to grow outdoors in the following regions:

Anchorage, Alaska

Carlsbad, California

Ceres, California

Davis, California

El Cerrito, California

Fairview, California

Fountain Valley, California

San Francisco, California

San Jose, California

Denver, Colorado

Littleton, Colorado

Itasca, Illinois

Des Moines, Iowa

Cumberland, Maryland

Frederick, Maryland

East Longmeadow, Massachusetts

Bay City, Michigan

Minneapolis, Minnesota

Saint Paul, Minnesota

Kirksville, Missouri

Billings, Montana

Waterford Works, New Jersey

Painesville, Ohio

Williamsburg, Ohio

Pocola, Oklahoma

Portland, Oregon

Salem, Oregon

Lansdale, Pennsylvania

Norristown, Pennsylvania

Wilkes Barre, Pennsylvania

Maryville, Tennessee

Toone, Tennessee

Austin, Texas

Garland, Texas

Mc Kinney, Texas

Hanover, Virginia

Lexington, Virginia

Springfield, Virginia

Kalama, Washington

Seattle, Washington

Milwaukee, Wisconsin

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Featured Videos

Gardener's Notes:

9
positives
3
neutrals
2
negatives
Sort By:
Sort By:
C
McKinney, TX (Zone 8a) | June 2013 | neutral

The plant may do well in semi-shady areas of Zone 8, but it's loved by the bugs. Not sure which, but I think it's the pillbugs (rolly po...Read More

A
Carlsbad, CA (Zone 10b) | August 2010 | positive

I love this plant for it's delicate variegated leaves and planted it last fall in a new bed with other multicolored and unusual plants. ...Read More

E
East Longmeadow, MA (Zone 5b) | March 2010 | positive

This plant has a MUCH finer leaf structure and variegation than 'Snow & Sapphires'. Purchased two 1" pots last spring - planted in shade...Read More

G
(Zone 5a) | September 2007 | neutral

This is a patented plant.

F
Moorpark, CA | August 2007 | positive

Bought 2 and possibly planted them too close together, something went wrong. one died within a month. The other is still flourishing in a...Read More

B
Lakemont, GA (Zone 8a) | March 2007 | neutral

Medium 18-24" - Plant 16" apart. zone 4-8 The elegant, vibrant, creamy variegated foliage brightens any garden spot. Violet-blue flowers....Read More

M
M
Charlevoix, MI (Zone 4b) | March 2007 | positive

I've had this growing in a shady spot in my herb garden for a couple of years, it always comes back and looks great right now (snow just ...Read More

J
Collierville, TN | October 2005 | negative

I bought two from the Botanic Gardens here in Memphis, TN, zone 7. They did wonderfully on the porch for 2-3 months. I was going out of...Read More

T
El Cerrito, CA (Zone 9b) | February 2005 | positive

This gorgeous plant has been deer-proof in our heavily browsed yard near regional park land.

R
Seattle, WA (Zone 8b) | October 2004 | positive

Grows very well for me in Z8b. I have had it for going on 5 seasons now, and have divided it 3 times. Small 'pups' formed around the ou...Read More

B
SC, MT (Zone 5a) | July 2004 | positive

I have great luck with this plant at 3500' in Z5a....However, I grow it in more shade than sun...it is in with my hostas. Our hot summe...Read More

C
Columbus (Berwick), OH (Zone 5b) | March 2004 | positive

I live in columbus ohio. We are noted as zone 5. I planted this along the inside of my front patio area in a protected area and mulched ...Read More

K
K
Mount Prospect, IL (Zone 5a) | July 2003 | negative

I am in zone 5A(4B), and have tried this plant several times in several places - has NEVER come back, and sometimes didn't even make it t...Read More

P
Westbrook, ME (Zone 5a) | January 2003 | positive

This hybrid with gorgeous foliage has become quite popular in the trade. It came through it's first winter here in zone 5 with flying col...Read More

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