The polemoniums have cut leaves and produce blue flowers in spring or summer. They grow in ordinary soil but do not tolerate hot sunny sites. Planting or division is done in spring or fall. Most polemoniums tolerate light or partial shade.
Polemonium caeruleum--Jacob's Ladder This polemonium grows 18 to 25 inches tall and is spaced 18 inches apart. It grows in sun or shade in any average well drained soil. Blue, pink, or white flowers are produced in June. Divide the plant in late summer or propagate from cuttings in mid-summer.
Polemonium reptans--Creeping Jacob's Ladder Creeping Jacob's Ladder is a sprawling, mounded plant growing 6 to 8 inches tall. The flowers are blue and removal of seed heads may encourage a second crop of flowers. Provide sun to partial shade and any ordinary garden soil but avoid hot dry conditions. Propagation is by seed, division or cuttings. Division is done spring or fall. Plants rise out of the ground as they age so need dividing. Stem cuttings can be taken in summer.
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