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Polemonium boreale

Family: polemoniaceae
Common name(s): Northern Jacob's Ladder
Hardiness ratings: USDA zone 3~4 - 7~9

General resources

• Wikipedia. Online encyclopedia entry (if defined).
• Google images. Web search for photographs.
• The Plant List. Taxonomical lookup
• Catalogue of Life. Taxonomical lookup

Links for Polemonium boreale

• Asianflora - Plant photos. (1 photo)
• Dave's Garden PlantFiles - Profile page with horticultural basics, and member-contributed photos and comments. (zone 3-9) (1 photo)
• Denver Botanic Gardens - Description, native range, and cultural requirements. (zone 3) (1 photo). Also a page for 'Heavenly Habit'.
• Garden.org - Community-assembled plant profile (3 varieties in database) (1 photo)
• Heritage Perennials: Polemonium boreale ‘Heavenly Habit’ - Profile with description and horticultural details. (zone 3-9) (1 photo)
• Iris' Garden - Gardener in the Netherlands presents a photo of this plant, with basic horticultural information. (1 photo)
• Lady Bird Johnson Wildflower Center - Plant description and characteristics with notes on distribution, culture, and propagation.
• North Carolina State University factsheet: Polemonium boreale 'Heavenly Habit' - Plant profile with horticultural details and comments (zone 3-7a) (3 photos)
• Ontario Rock Garden Society - Germination information (additional information for other varieties)