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Polemonium caeruleum

Jacob's ladder

Garden

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  • Polemonium caeruleum | Copyright Greenplantswap 2020
  • Polemonium caeruleum | Copyright Greenplantswap 2020

Features

  • BloomsJune to July
  • Height0.3m to 1m
  • Spread0.2m to 0.35m
  • Growth HabitBranched clump
  • Flower ColourBlue shades, rarely white
  • Leaf ColourGreen shades

Description

Polemonium caeruleum (Jacob's ladder). This species will produce blue flowers which will emerge in late spring and continue into the summer. This plant is often found in the wild in Northern Europe.

Characteristics

Perennial, Deciduous, Fragrant

Other common names

Greek valerian, Charity

Origin

Europe, Asia

Interest and use

Rock garden Spring/Summer interest.

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  • Polemonium caeruleum | Copyright Greenplantswap 2020
  • Polemonium caeruleum | Copyright Greenplantswap 2020

Needs

  • LightFull sun
  • HardinessHardy (min -10°C)
  • SoilWell drained, Light, Medium
  • Soil pH7.0
  • WaterSemi-moist

Cultivation

They are very frost hardy and easily cultivated in any moist, well-drained soil in sun or partial-shade.

Propagation

You can propagate the annuals from seed and the perennials from seeds or cuttings. You can also lift and divide plants.

Pests, diseases or disorders

Powdery mildew may be a problem.

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