Family: polemoniaceae
Common name(s): Jacob's ladder
Hardiness ratings: USDA zone 3~4 - 7~9
General resources
Links for Polemonium caeruleum
Links
Links
Links
Common name(s): Jacob's ladder
Links
Common name(s): Purple-leaf Jacob's Ladder
Synonym(s): Polemonium yezoense Hardiness ratings: USDA zone 3~5 - 7~9
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