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PlantFiles: Jacob's Ladder
Polemonium yezoense 'Purple Rain'

Family: Polemoniaceae (po-le-moh-nee-AY-see-ee) (Info)
Genus: Polemonium (po-le-MOH-nee-um) (Info)
Species: yezoense (yez-oh-EN-see) (Info)
Cultivar: Purple Rain

3 vendors have this plant for sale.

6 members have or want this plant for trade.


18-24 in. (45-60 cm)

18-24 in. (45-60 cm)

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)

Sun Exposure:
Sun to Partial Shade

Unknown - Tell us

Bloom Color:

Bloom Time:
Mid Spring
Late Spring/Early Summer
Mid Summer

Grown for foliage
Good Fall Color

Other details:
Requires consistently moist soil; do not let dry out between waterings

Soil pH requirements:
Unknown - Tell us

Patent Information:
Unknown - Tell us

Propagation Methods:
By dividing the rootball

Seed Collecting:
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed

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No positives
2 neutrals
No negatives

Gardeners' Notes:

Neutral Meshelle On May 10, 2012, Meshelle from Sam's Valley, OR (Zone 7b) wrote:

This is a new plant for me - I just bought it at the Master Gardener's Spring Fair. I have not read anywhere about the fragrance of this plant's flowers. Mine smells like grape kool-aid. I hope it thrives in my garden.

Neutral Illoquin On Feb 21, 2007, Illoquin from Indianapolis, IN (Zone 5b) wrote:

There is also a 'Purple Rain Strain' -- leaving the window open for bronzey-foliaged plants like this to come somewhat true from seed.


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

Ashton, Illinois
Evansville, Indiana
Greene, New York
Pembina, North Dakota
Geneva, Ohio
Eugene, Oregon
White City, Oregon
West Chester, Pennsylvania
Kalama, Washington
Watertown, Wisconsin

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