Polemonium caeruleum
Jacob's Ladder
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Jacob's Ladder (Polemonium caeruleum) - Description
Jacob's Ladder or Greek valerian (Polemonium caeruleum) is a hardy perennial flowering plant. The plant produces cup-shaped, lavender-coloured or white flowers. It is native to temperate regions of Europe.
Jacob's Ladder (Polemonium caeruleum) - Growth
Grow in full sun or partial shade. Taller species work well in a border or woodland garden. The smaller alpine species make nice additions to a rock garden, scree bed, or alpine house. P. brandegeei and P. pauciflorum are often short lived species.
Jacob's Ladder (Polemonium caeruleum) - Planting
Divide in spring, or grow from seed in spring or fall in containers in a cold frame (for protection and to ensure hardiness).
Jacob's Ladder (Polemonium caeruleum) - Pest
The only real problem is powdery mildew.
Jacob's Ladder (Polemonium caeruleum) - Interesting facts
Polemonium is endemic to the alpine regions of Europe, Asia, North America, and Central America. Species are often found near streams or in damp meadows, woodlands, scrubs. Some grow in high altitude mountains.
Jacob's Ladder (Polemonium caeruleum) - Soil and irrigation
Tall varieties prefer moist, well-drained soil. Smaller species need sharply drained, gritty soil.
