Polemonium caeruleum is a hardy, erect perennial from the Polemoniaceae family of plants. They also call it Jacob’s Ladder, Greek Valerian, American Great Valerian, Charity, Great Valerian, Ladder to Heaven, or Make-Bate. This plant is native to Europe and Northern Asia.
Flowers grow in spring. It produces sprays of cup-shaped violet or blue flowers with yellow stamens. The name “caeruleum” is a reference to its color meaning sky blue. Polemonium caeruleum can grow to 24in or 60cm tall. It grows in meadows and woodlands.
How to grow Polemonium caeruleum:
Grow Polemonium caeruleum in partial or full shade. Plant it in humus-rich, evenly moist, but well-drained soil. Don’t let it dry out, but don’t let it be soggy. It prefers cooler summers. It is generally disease-free. Watch out for powdery mildew, in hot humid climates, and with limited air circulation. Cut back the plant to basal leaves, after flowering, if you prefer to prevent self-seeding.