This Polemonium forms a mound of dark ferny foliage.
Pronunciation
(po-le-MOH-nee-um)(see-ROO-lee-um)
Plant Type
All Plants, Perennials Hardy
Hardiness Zone
(3)4-7
Sunlight
partial shade to shade, will tolerate some morning sun
Moisture
average, moist, never dry
Soil & Site
prefers rich well drained moist, tolerates average
Temperature
Probably does best in cooler climates.
Flowers
cup shaped, light blue, borne on a terminal cluster (cyme)
Leaves
ferny dark, bronze purple
Dimensions
18 by 12-18 inches (HS), upright growth form
Maintenance
can be pruned back if foliage becomes shabby
Propagation
division, seeds may or may not produce the traits of the parents
Cultivar Origin
"The original seed was collected at altitude in Japan where it is already accepted as one of the largest flowered gems of the race. In 1991, in one tray of seedlings, one plant developed with darker foliage which was especially notable in spring when it developed a purple rosette. Subsequent generations retained this feature, with a proportion being extremely darker leaved". (http://www.seedaholic.com/polemonium-yezoense-purple-rain.html)
Notes & Reference
#04-Herbaceous Perennial Plants (Allan Armitage), #49-The History and Folklore of North American Wildflowers (Timothy Coffey), #100-Wildflowers of Wisconsin and the Upper Midwest (Merel Black and Emmet Judziewicz), #165-Wildflower Perennials for Your Garden (Bebe Miles)