Polemonium boreale
Northern Jacob's ladder, Arctic Jacob's ladder, Boreale Jacob's ladder, Polemonium boreale 'Blue Whirl', Polemonium boreale 'Bambino Blue', Polemonium boreale 'Azuro', Polemonium boreale 'Blue Swirls', Polemonium boreale 'Blue Pearl', Polemonium pulcherrimum, Polemonium richardsonii, Polemonium pulcherrimum 'Tricolor', Polemonium viscosum 'Blue Whirl'
Polemonium Polemonium
P. boreale - P. boreale is a compact, clump-forming, herbaceous perennial with pinnate leaves divided into numerous small, oval to oblong, dark green leaflets and, in summer, upright, branching stems bearing panicles of light violet-blue flowers with yellow eyes.
Polemonium boreale is: Deciduous
Clump-forming, Compact
Violet, Blue in Summer
Green in Spring; Green in Summer; Green in Autumn
Powdery mildew Powdery mildew
Deadhead regularly. If becoming untidy, cut back by half in midsummer to rejuvenate. Cut to the base in autumn.
Division, Seed
Sign up for your FREE ACCOUNT today or login to receive detailed monthly care instructions
Polemonium boreale (Northern Jacob's ladder) will reach a height of 0.3m and a spread of 0.4m after 2-5 years.
Beds and borders, Cottage/Informal, Low Maintenance
Grow in gritty, moist but sharply-drained, preferably neutral to alkaline soil in sun or partial shade. Needs consistently moist soil in growth but avoid waterlogged conditions in winter. Needs afternoon shade in areas with warm summers. This species is often incorrectly sold as a number of different cultivar names.
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Moist but well-drained
Alkaline, Neutral
Partial Shade, Full Sun
South, East, West
Exposed, Sheltered
Hardy (H4)
We do not currently have companion plants added for this plant.
Polemonium boreale
Northern Jacob's ladder, Arctic Jacob's ladder, Boreale Jacob's ladder, Polemonium boreale 'Blue Whirl', Polemonium boreale 'Bambino Blue', Polemonium boreale 'Azuro', Polemonium boreale 'Blue Swirls', Polemonium boreale 'Blue Pearl', Polemonium pulcherrimum, Polemonium richardsonii, Polemonium pulcherrimum 'Tricolor', Polemonium viscosum 'Blue Whirl'
Polemonium Polemonium
P. boreale - P. boreale is a compact, clump-forming, herbaceous perennial with pinnate leaves divided into numerous small, oval to oblong, dark green leaflets and, in summer, upright, branching stems bearing panicles of light violet-blue flowers with yellow eyes.
North America, Northern Asia, Northern Europe
Deciduous
Clump-forming, Compact
Create your free SHOOT garden and make a record of the plants in your garden.
Add your own photos, notes, get monthly email reminders on how to care for your plants, and connect with other gardeners. Get started now.
Violet, Blue in Summer
Green in Spring; Green in Summer; Green in Autumn
Deadhead regularly. If becoming untidy, cut back by half in midsummer to rejuvenate. Cut to the base in autumn.
Division, Seed
Create a free SHOOT account and get instant access to expert care advice for this and other plants in your garden.
You'll also receive handy monthly email reminders of what needs doing. Create your free account.
Polemonium boreale (Northern Jacob's ladder) will reach a height of 0.3m and a spread of 0.4m after 2-5 years.
Beds and borders, Cottage/Informal, Low Maintenance
Grow in gritty, moist but sharply-drained, preferably neutral to alkaline soil in sun or partial shade. Needs consistently moist soil in growth but avoid waterlogged conditions in winter. Needs afternoon shade in areas with warm summers. This species is often incorrectly sold as a number of different cultivar names.
Chalky, Clay, Loamy, Sandy (will tolerate most soil types)
Moist but well-drained
Alkaline, Neutral
Partial Shade, Full Sun
South, East, West
Exposed, Sheltered
Hardy (H4)
Zone 8, Zone 7, Zone 6, Zone 5, Zone 4
In order to add a note on this plant, please add this plant to your plant lists.
This plant likes... | Garden match | |
Soil types: | Chalky, Clay, Loamy, Sandy (will tolerate most soil types) | Tell us... |
Soil drainage: | Moist but well-drained | Tell us... |
Soil pH: | Alkaline, Neutral | Tell us... |
Light: | Partial Shade, Full Sun | Tell us... |
Aspect: | South, East, West | Tell us... |
Exposure: | Exposed, Sheltered | Tell us... |
Hardiness: | Hardy (H4) | Tell us... |
To add ? to your lists,
login to your account or subscribe.
Find out more about plant lists here
or Login
To add notes for this plant login to your account or register for a new account.
Sign up for freeor Login
To add images for this plant login to your account or register for a new account.
Sign up for freeor Login
To check if this plant is suitable for your garden first login to your account or subscribe.
or Login