Polemonium, commonly known as Jacob's ladder, is a genus of herbaceous perennials or annuals that form bushy, spreading clumps. These plants have pinnate, deciduous leaves and produce clusters of tubular or bell-shaped flowers. They thrive in fertile, moist but well-drained soils and can be grown in full sun or partial shade, suitable for various garden aspects and exposures. Hardy to UK zone H7, Polemonium is ideal for cottage gardens, flower borders, and containers, offering interest through summer and autumn.

Jacob's ladder (Polemonium) is a hardy perennial with pinnate leaves and tubular flowers, ideal for summer and autumn in borders or containers.

Polemonium, commonly called Jacob's ladders or Jacob's-ladders, is a genus of between 25 and 40 species of flowering plants in the family Polemoniaceae, native to cool temperate to arctic regions of the Northern Hemisphere. One species, Polemonium micranthum, also occurs in the southern Andes in South America.

Polemonium

Jacob's ladder | Polemonium

Polemonium 'Lambrook Mauve' is a perennial cultivar of the genus Polemonium, commonly known as Jacob's ladders. This plant thrives in moist, well-drained soil and can be grown in full sun to partial shade. It is hardy in the UK (H5) and is suitable for borders, rock gardens, and containers. To maintain its shape and encourage further blooming, deadhead spent flowers and cut back after flowering.

Polemonium 'Lambrook Mauve' is a hardy perennial ideal for borders, rock gardens, and containers, thriving in full sun to partial shade with moist soil.

Polemonium 'Lambrook Mauve'

Polemonium caeruleum, known as Jacob's-ladder or Greek valerian, is a hardy perennial flowering plant. The plant produces cup-shaped, blue or white flowers.

Polemonium caeruleum, or Jacob's-ladder, is a hardy perennial with blue or white cup-shaped flowers, ideal for borders, patios, and cottage gardens.

https://en.wikipedia.org/wiki/Polemonium_caeruleum

Polemonium caeruleum

Jacob's Ladder (Polemonium caeruleum 'Album') is a hardy perennial with cup-shaped white flowers, thriving in full sun for bright garden displays.

Polemonium caeruleum 'Album'

Polemonium caeruleum 'Dawn Flight' is a perennial in the Polemoniaceae grown for its summer display of blue or white flowers. It reaches about 0.4 m tall and suits sunny locations where soil stays moist but well-drained. Plant in sandy or loamy ground and expect blooms from May to July. Allow room for flowering stems when placing it in mixed borders.

Jacob's Ladder (Polemonium caeruleum 'Dawn Flight') is a perennial to 0.4 m that flowers May to July and prefers full sun in moist, well-drained sandy or.

Polemonium caeruleum 'Dawn Flight'

Jacob's Ladder | Polemonium caeruleum 'Dawn Flight'

Polemonium caeruleum 'Rose Queen' is a perennial Jacob's Ladder grown for its compact, herbaceous clumps and seasonal flowering. It reaches about 0.4 m tall and flowers in the UK from May to July. Best placed in full sun where soil is sandy or loamy and remains moist but well-drained. Give plants a sheltered spot with reliable moisture through the growing season.

Jacob's Ladder 'Rose Queen' is a 0.4 m perennial that flowers May to July and prefers full sun with moist, well-drained sandy or loamy soil.

Polemonium caeruleum 'Rose Queen'

Jacob's Ladder 'Rose Queen' | Polemonium caeruleum 'Rose Queen'

Polemonium carneum is a perennial in the Polemoniaceae that bears open clusters of bell-shaped flowers in a range of pale pinks, salmon, yellow and pale to medium purples. Flowering runs from May to July. It favours full sun to partial shade and a moist, well-drained loamy soil with a neutral to slightly acidic pH. Suited to garden borders and rock gardens where its summer blooms form a decorative edge.

Mountain valerian (Polemonium carneum) is a perennial that flowers May to July and prefers moist, well-drained loamy soil in full sun or partial shade.

https://en.wikipedia.org/wiki/Polemonium_carneum

Polemonium carneum

Mountain valerian | Polemonium carneum

Polemonium flavum is a perennial in the Polemoniaceae that produces yellow flowers. It flowers from May to July and prefers well-drained, sandy or rocky soil in full sun or partial shade on south-facing, exposed sites. Native to western North America, Yellow Jacob's Ladder suits rock and alpine gardens and the front of borders.

Yellow Jacob's Ladder (Polemonium flavum) is a perennial with yellow blooms from May to July, suited to south-facing rock and alpine gardens in.

Polemonium flavum

Yellow Jacob's Ladder | Polemonium flavum

Polemonium foliosissimum is a perennial in the Polemoniaceae that produces its flowers from May to July. It originates from several western US states, including Arizona, Colorado and Utah. In cultivation it favours well-drained sandy or loamy soils with a neutral to slightly acidic pH and tolerates full sun to partial shade. The plant suits rock gardens, borders and wildflower areas where moist but well-drained conditions can be provided.

Towering Jacob's-ladder (Polemonium foliosissimum) is a hardy perennial that flowers from May to July and suits full sun to partial shade in well-drained.

https://en.wikipedia.org/wiki/Polemonium_foliosissimum

Polemonium foliosissimum

Towering Jacob's-ladder | Polemonium foliosissimum

Polemonium kiushianum is a species of Polemonium in the family Polemoniaceae, known within the Jacob's ladder group. It produces its main flowering display in the UK from May to July. The plant is valued for that seasonal display and is treated by gardeners as a flowering perennial. Gardeners often compare its habits and timing with other Polemonium species when planning beds.

Polemonium kiushianum flowers in the UK from May to July and belongs to the Polemoniaceae family.

Polemonium kiushianum

Jacob's Ladder | Polemonium kiushianum

Polemonium yezoense 'Midnight Rain' is a herbaceous perennial cultivar of the Polemonium genus, known for its bushy, clump-forming, and spreading habit. Like other Polemonium species, it features pinnate leaves and produces clusters of tubular or bell-shaped flowers. This deciduous plant thrives in full sun or partial shade, favouring fertile, moist but well-drained soils across a range of types and pH levels. Hardy to UK zone H7, it is suitable for cottage gardens, flower borders, patios, and containers, offering interest throughout summer and autumn.

Polemonium yezoense 'Midnight Rain' is a hardy herbaceous perennial with pinnate leaves and summer to autumn blooms, ideal for borders and containers.