Purple Rain Jacob's Ladder

Purple Rain Jacob's ladder forms a compact mound of fine leaflets that emerge dark green flushed purple-black, with blue-purple flowers on dark stems in early summer. The contrasting foliage makes it useful among ferns and other woodland perennials in a moist border. ## Growing Conditions Plant in full sun or partial shade in fertile, moist but well-drained soil; the [RHS profile](https://www.rhs.org.uk/plants/115423/polemonium-yezoense-var-hidakanum-purple-rain/details) lists clay, loam and sand as suitable. Sources give different mature heights: the RHS lists 0.5–1 m, while [Glover Perennials](https://www.gloverperennials.com/wp-content/uploads/2026/04/2026-GP_Catalog-1.pdf) lists 12–18 inches and USDA Zone 5. Glover reports fragrant, dark-blue flowers and bronze-purple foliage; the RHS describes purple flowers with cream anthers. These source descriptions support a blue-purple range and explain variation in the plant's mature size. ## Seasonal Interest Star-shaped blooms appear in early summer above the dark foliage. Combine it with ferns, sedges, woodland phlox or other shade-border perennials. ## Maintenance Cut stems back to ground level at season's end. Divide in spring if propagation or renewal is needed.