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Herbaceous Perennial
Polemonium 'Blue Pearl'
Jacob's ladder 'Blue Pearl'
A compact herbaceous perennial up to 30cm high with fresh green pinnate leaves and sky-blue flowers in early summer
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Size
Ultimate height
0.1–0.5 metresTime to ultimate height
2–5 yearsUltimate spread
0.1–0.5 metresGrowing conditions
Chalk
Clay
Loam
Sand
Moisture
Moist but well–drainedpH
Acid, Alkaline, NeutralColour & scent
| Stem | Flower | Foliage | Fruit | |
| Spring | Green | |||
|---|---|---|---|---|
| Summer | Blue | Green | ||
| Autumn | Green | |||
| Winter |
Position
- Full sun
- Partial shade
Aspect
South–facing or North–facing or West–facing or East–facing
Exposure
Exposed or Sheltered Hardiness
H7Botanical details
- Family
- Polemoniaceae
- Native to GB / Ireland
- No
- Foliage
- Deciduous
- Habit
- Matforming
- Genus
Polemonium can be annuals or herbaceous perennials or upright or spreading habit, with pinnate leaves and usually clustered, tubular, bell, or funnel-shaped flowers
- Name status
Unresolved
How to grow
Cultivation
Grow in any fertile, leafy, moist but well-drained soil in full sun or partial shade
Propagation
Propagate by division
Suggested planting locations and garden types
- Rock garden
- City and courtyard gardens
- Cottage and informal garden
- Flower borders and beds
Pruning
No pruning required
Pests
Generally pest-free
Diseases
Generally disease-free but may be affected by powdery mildews
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