Oak Summit Nursery
Jacob's Ladder Seeds
Jacob's Ladder Seeds
Pack contains: 200+ seeds
Regular price
$5.95 CAD
Regular price
Sale price
$5.95 CAD
Unit price
per
Jacob's Ladder (Polemonium caeruleum) is a hardy perennial with divided foliage arranged like the rungs of a ladder. Clusters of blue to violet bell shaped flowers rise above the leaves from late spring into summer.
Plants favour partial shade and cool, moist, well drained soil and are less tolerant of prolonged heat and high humidity.
Cold Hardiness Zone: 3
Seed Source: Europe
Mature Size: 12 to 24 inches
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Growing details
- Foliage
- Pinnate mid-green leaves with paired leaflets and a ladder-like appearance
- Hardiness reference
- RHS H7, below -20 °C; this is not a USDA or Canadian zone rating
- Native range
- Native to temperate Eurasia, not Manitoba; this is a range inference, not a local occurrence record
- Growing site
- Full sun or partial shade; fertile, moist but well-drained clay, loam or sand; broad pH tolerance
- Disease note
- Powdery mildew may sometimes be a problem
- Spread habit
- Clump-forming and may self-seed freely; root suckering remains unknown
Cold hardinessZone 3 · Canadian maps for this plant
Zone 3 and warmer
The map shows minimum winter hardiness. Soil, moisture and summer warmth also affect how a plant grows.
About these maps
Climate: Natural Resources Canada, 1991–2020. Provincial distribution: VASCAN via retained botanical research. Province outlines: Natural Earth, public domain.
Open Government Licence – Canada