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Almanac Planting Jacob's Ladder (Polemonium caeruleum) close up image of flower.
Almanac Planting Jacob's Ladder (Polemonium caeruleum) light blue flowers in a cluster growing in a field.
  • Load image into Gallery viewer, Almanac Planting Jacob's Ladder (Polemonium caeruleum) close up image of flower.
  • Load image into Gallery viewer, Almanac Planting Jacob's Ladder (Polemonium caeruleum) light blue flowers in a cluster growing in a field.

Jacob's Ladder

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$12.95
Sale price
$12.95
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Polemonium caeruleum

Overview

Uses: Easy to grow flowering perennial for outdoor, patio, and potted uses.  

Benefits: Attracts Pollinators. Deer Resistant. Beautiful deep blue flowers.

Zones: 4 - 9

Sun: Full Sun to Partial Shade (Avoid exposure to strong, afternoon sun)

Life Cycle: Perennial 

Mature Height: 24" 

Mature Width: 24" 

Bloom Season: Mid to Late Spring

Summary

Polemonium caeruleum is a perennial flowering plant that's best known for both its beauty and ease of care. 

It develops bright blue flowers in mid to late spring, that rise well above the unique foliage of this plant. 

Known to attract pollinators and hummingbirds. 

It's common name, Jacob's Ladder, originated as a result of this plants' leaf design, which contains up to 20 leaflets and resembles the shape of a ladder. Many people also describe the leaflets as quite fernlike in appearance. 

Jacobs Ladder grows in a mound-like shape that's perfect for a variety of locations like borders, edges, woodland settings, rock gardens, shade gardens, and planters. 

Care

Jacob's Ladder Care

Polemonium caeruleum is known to be very easy to care for and does not require much maintenance. 

Flowers may be deadheaded after the completion of their blooms to prevent the possibility of self-seeding.

Flowers and their stalks may be trimmed after spring blooms. This will result in a plant with a neat appearance and may also promote a second blooming in late summer. 

Grows best when planted in areas of partial shade that do not receive strong afternoon sun. 

Does not like very high heat (90°F+) or high humidity.

Does best in slightly moist soil. Irrigate during periods of drought. 

Size

Size of Jacob's Ladder for Sale

We ship our Polemonium caeruleum in a 4" grow pot. The plant will be appropriately sized for its pot. 

Size of Jacob's Ladder When Fully Grown

Polemonium caeruleum typically grows in a somewhat mound-like shape to an average size of around 24" x 24". It can grow as tall as 36" during periods of flowering. 

Additional Information

Common Names of Polemonium caeruleum

  • Jacob's Ladder

  • Greek Valerian

Toxicity and Risks of Jacob's Ladder

We are unable to find any information that would lead us to believe that Polemonium caeruleum is toxic.

Numerous sources of information specifically mention that Jacob's Ladder is not toxic to people or pets.