Scientific Name:
Polemonium caeruleum
Pronunciation:
poe-lih-MOE-nee-um sih-ROO-lee-um
Common Name:
Jacob's ladder
Family Name:
Polemoniaceae
Plant Type:
Herbaceous perennial
Key ID Features:
Leaves odd-pinnately compound, resembling ladders; flowers usually deep blue in terminal cymes.
Habit:
Upright
Form:
Oval - vertical
Texture:
Medium - fine
Mature Height:
0.4 - 0.7m
Mature Spread:
0.3 - 0.6m
Growth Rate:
Fast
Origin:
Europe
Hardiness Rating:
Zone 3: (-40 to -34 °C)
Exposure:
Full sun only if soil kept moist, Part sun/part shade
Soil/Growing Medium:
Well-drained
Landscape Uses:
Attract beneficial insects, Container planting, Cut flower or foliage, Medicinal plant, Perennial border, Rock garden
Additional Info:
Google. Grown as an annual in climates below zone 6 and may self seed.
Leaf Morphology:
Form:
Compound
Arrangement:
Alternate
Texture/Venation:
Soft flexible
Surfaces:
Glabrous
Compound Leaf:
Odd-pinnate
Shapes:
Ovate
Apices:
Acute
Margins:
Entire
Inflorescence Type:
Cyme, Panicle-like
Flower Morphology:
Flowers perfect
Number Of Petals:
5
Corolla Shape:
Funnelform
Ovary Position:
Superior
Colour (petals):
Showy, White, Blue, Purple (depends on cv.)
Flower Time at Peak:
May, Jun, Jul
Fruit Type:
Capsule
Fruit Colour:
Green, Brown
Fruiting Time:
Bark or Stem Colour:
Green
Maintenance:
Medium
Pest Susceptibility:
Fungal leaf spot, Slugs or snails (Pest resistant, Disease resistant, Deer resistant, Rabbit resistant)
