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Polemonium foliosissimum
Also called Leafy Jacob's Ladder, Leafy Polemonium
Towering Jacob's-ladder is a perennial wildflower of high mountain meadows and subalpine slopes in the western United States, grown in gardens for its tall clusters of blue flowers. Give it cool summers, moist but well-drained soil, and part shade in hot areas.
Polemonium foliosissimum, the towering Jacob's-ladder, is a rare species of flowering plant in the phlox family Polemoniaceae, native to the western United States; Arizona, Colorado, New Mexico, and Utah. As its synonym Polemonium archibaldiae it has gained the Royal Horticultural Society's Award of Garden Merit.
Text excerpted from the Wikipedia article Polemonium foliosissimum 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.
