Photo by Melody

PlantFiles: Jacob's Ladder
Polemonium delicatum

Family: Polemoniaceae (po-le-moh-nee-AY-see-ee) (Info)
Genus: Polemonium (po-le-MOH-nee-um) (Info)
Species: delicatum (del-ih-KAY-tum) (Info)

Alpines and Rock Gardens

under 6 in. (15 cm)

3-6 in. (7-15 cm)

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:
Sun to Partial Shade

Unknown - Tell us

Bloom Color:
Medium Blue

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

Unknown - Tell us

Other details:
Unknown - Tell us

Soil pH requirements:
Unknown - Tell us

Patent Information:

Propagation Methods:
Unknown - Tell us

Seed Collecting:
Unknown - Tell us

Click thumbnail
to view:

By Toxicodendron
Thumbnail #1 of Polemonium delicatum by Toxicodendron

By Sitkagardener
Thumbnail #2 of Polemonium delicatum by Sitkagardener


No positives
1 neutral
No negatives

Gardeners' Notes:

Neutral macybee On Oct 12, 2007, macybee from Deer Park, TX (Zone 9a) wrote:

Polemonium - Jacob's Ladder
This genus of around 25 species of annuals and perennials is distributed over the Arctic and temperate regions of the northern hemisphere. They form clumps of soft, bright green, ferny, pinnate leaves from which emerge upright stems topped with heads of short, tubular, bell- or funnel-shaped flowers usually in white or shades of blue or pink. Completely dormant in winter, they develop quickly in spring and are in flower by early summer.
Cultivation: Most species are very frost hardy and easily cultivated in moist, well-drained soil in sun or part-shade. Propagate annuals from seed; perennials from seed or cuttings of young shoots or by division. Some species self-sow freely.
P delicatum - Skunkleaf Jacob's Ladder
This native of the Midwest and western USA has leaves less than 4" long made up of 5 to 11, 1/2-1" long leaflets. The flowers are also small, blue to violet and open in summer. It is an excellent rockery species.
Zones 6-9


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

Sitka, Alaska

We recommend Firefox
Overwhelmed? There's a lot to see here. Try starting at our homepage.

[ Home | About | Advertise | Media Kit | Mission | Featured Companies | Submit an Article | Terms of Use | Tour | Rules | Privacy Policy | Contact Us ]

Back to the top

Copyright © 2000-2015 Dave's Garden, an Internet Brands company. All Rights Reserved.

Hope for America