A picture of a Jacob's Ladder

Jacob's Ladder

Polemonium caeruleum

Also known as

Greek Valerian, Jacob's Ladder [Brise D'Anjou], Charity

Full Sun
Moderate care
Moderate watering
Frost Hardy

H7

RHS hardiness

-20°C

Minimum temperature

Expected size

Height
Spread

1m

Max

50cm

50cm

Min

10cm

5 years to reach maturity

Flowering

  • spring
  • summer
  • autumn
  • winter

This plant has a mild fragrance

More images of Jacob's Ladder

A photo of Jacob's Ladder
A photo of Jacob's Ladder
A photo of Jacob's Ladder
A photo of Jacob's Ladder
A photo of Jacob's Ladder

Jacob's Ladder Overview

Polemonium caeruleum has a clump forming nature that in spring produces mounds of fern like green leaves on erect stems, these die back in late autumn. In summer, blue bell shaped flowers appear in clusters from tall upright stems.

Common problems with Jacob's Ladder

Generally pest free.

How to harvest Jacob's Ladder

Generally not harvested.

How to propagate Jacob's Ladder

Seed

Jacob's Ladder are easy to grow from seed and can self-seed around themselves quickly in the right condition. These can be lifted and potted on when young. Otherwise, seed can be collected and sown where you would like them to grow in either autumn or spring. Seed can also be sown indoors in early spring, and grown on until after the last frost before planting out.

Division

Lift and divide clumps in early spring as the plants new growth starts to emerge. Re plant into its new position straight away and water.

Cuttings

You can propagate the annuals from seed and the perennials from seeds or cuttings.

Special features of Jacob's Ladder

Attracts bees

Other uses of Jacob's Ladder

This plant suits being included in mixed borders in cottage or informal garden designs. It will also do well in woodland, wildlife friendly and coastal plantings.

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