Plant Wiki

The open plant encyclopedia

Know any plant.
Grow it well.

Snap a photo or search by any name to see how to care for it, where it comes from, whether it's safe, and a 3D model you can turn.

  • 13,000+plants with full pages
  • 365,000+plant species worldwide
  • 220+countries covered

Common in

See all

The plants people record most in your country, and ones that grow there wild.

What do you want to do?

Popular plants

Browse all plants

See them in 3D

All plants in 3D

Browse plants

Filter by what you want to do, shape, origin, country, care and safety.

Plant Wiki › Browse plants

Greek valerian

Polemonium reptans

Also called Creeping Polemonium, Spreading Jacob's Ladder, Creeping Jacob's Ladder, Jacob's Ladder

Greek valerian
Photo: Ryan Kaldari, Public domain

Polemonium reptans is a native North American perennial wildflower with clusters of light blue bell-shaped flowers in spring. It grows best in part shade with consistently moist, rich soil.

Family
Polemoniaceae (Polemoni family)
Grows as
Perennial
Light
Full sun, Part shade
Water
Keep the soil constantly moist, especially in full sun.
Soil
Moist, humus-rich, well-drained loam.
Temperature
Hardy to around -30 °C; tolerates cold winters.
How easy
Easy
Native range
E. Canada to NC. & E. U.S.A.
Climate
temperate

About

Polemonium reptans is a perennial herbaceous plant native to eastern North America. Common names include spreading Jacob's ladder, creeping Jacob's ladder, false Jacob's ladder, abscess root, American Greek valerian, blue bells, stairway to heaven, and sweatroot.

How to grow it

The plant prefers partial shade and mesic soil. It tolerates full sun, but requires constantly moist soil.

Where it grows

The flowers produce both pollen and nectar. Long- and short-tongued bees visit the plants for both nectar and pollen, syrphid flies and fire beetles (Pedilus lugubris) feed on pollen, and butterflies and moths drink nectar. Out of these insects, large bees are the most effective at cross-pollination, since they most often touch the pollen-covered anthers.

Uses

The dried roots have a slightly bitter and acrid taste. P. reptans has been traditionally used as an herbal medicine for febrile and inflammatory diseases, to ease coughs, colds and bronchial complaints, and to encourage perspiration. It is furthermore said to bring relief in cases of inflammations and infections. The root is rarely used in modern herbalism. It is harvested in the autumn and dried for later use.

Other Polemonium plants

Jacob's Ladder · Towering Jacob's-ladder · Jacob's-ladder

Text excerpted from the Wikipedia article Polemonium reptans by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

Credits & terms

Identify a plant

Point at a leaf or flower and snap. One plant in frame works best.

Your photo
Starting camera…