A hardy, clump-forming perennial, 30-90 cm (1-3 ft.) tall, it grows on a creeping rootstock, with pinnate leaves divided into lance-shaped leaflets. The lavender-blue, bell-shaped flowers are borne on erect stems in drooping panicles.<\/p>\n
This is an ornamental plant, which retains its place in the herb garden through its ancient traditions and associations. Known to the Greeks, it was mentioned by Discords, used for treating dysentery and thought to be effective against the bites of venomous beasts. It was still listed in various European pharmacopoeias into the 19th century. The whole flowering plant and roots were used and it was recommended for venereal disease and the bites of rabid dogs, but it is no longer considered to be of medicinal value. The name Jacob\u2019s ladder comes from the ladder-like arrangement of the leaves, and someone thought of associating it with the ladder to heaven of Jacob\u2019s dream in the biblical story (Genesis 28:12), with the sky represented by the blue flowers.<\/p>\n
Requires rich, moisture-retentive soil and a shady or partially shady position. Propagated by seed sown in spring or by division in autumn.<\/p>\n
Rarely used today.<\/p>\n","protected":false},"excerpt":{"rendered":"
A hardy, clump-forming perennial, 30-90 cm (1-3 ft.) tall, it grows on a creeping rootstock, with pinnate leaves divided into lance-shaped leaflets. The lavender-blue, bell-shaped flowers are borne on erect stems in drooping panicles. History and traditions This is an ornamental plant, which retains its place in the herb garden through its ancient traditions and […]<\/p>\n","protected":false},"author":2,"featured_media":782,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[109,123,156,110,98,127,160,124,122,99,113,114,145,118,121],"tags":[],"class_list":["post-781","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-acidic-soil","category-blue","category-herbaceous","category-neutral-soil","category-partial","category-perennial","category-perennial-plant-type","category-pink","category-purple","category-shade","category-spring","category-summer","category-well-drained","category-white","category-yellow"],"meta_box":{"botanical-name":"Polemonium caeruleum","common-names":"Greek valerian, Jacob's ladder","family":"Polemoniaceae","flower_bloom_time":[{"term_id":113,"name":"Spring","slug":"spring","term_group":0,"term_taxonomy_id":113,"taxonomy":"category","description":"","parent":112,"count":96,"filter":"raw"},{"term_id":114,"name":"Summer","slug":"summer","term_group":0,"term_taxonomy_id":114,"taxonomy":"category","description":"","parent":112,"count":163,"filter":"raw"}],"flower_color":[{"term_id":123,"name":"Blue","slug":"blue","term_group":0,"term_taxonomy_id":123,"taxonomy":"category","description":"","parent":116,"count":24,"filter":"raw"},{"term_id":124,"name":"Pink","slug":"pink","term_group":0,"term_taxonomy_id":124,"taxonomy":"category","description":"","parent":116,"count":54,"filter":"raw"},{"term_id":122,"name":"Purple","slug":"purple","term_group":0,"term_taxonomy_id":122,"taxonomy":"category","description":"","parent":116,"count":60,"filter":"raw"},{"term_id":118,"name":"White","slug":"white","term_group":0,"term_taxonomy_id":118,"taxonomy":"category","description":"","parent":116,"count":113,"filter":"raw"},{"term_id":121,"name":"Yellow","slug":"yellow","term_group":0,"term_taxonomy_id":121,"taxonomy":"category","description":"","parent":116,"count":76,"filter":"raw"}],"plant_life_cycle":[{"term_id":127,"name":"Perennial","slug":"perennial","term_group":0,"term_taxonomy_id":127,"taxonomy":"category","description":"","parent":84,"count":133,"filter":"raw"}],"plant_types":[{"term_id":156,"name":"Herbaceous","slug":"herbaceous","term_group":0,"term_taxonomy_id":156,"taxonomy":"category","description":"","parent":88,"count":5,"filter":"raw"},{"term_id":127,"name":"Perennial","slug":"perennial","term_group":0,"term_taxonomy_id":127,"taxonomy":"category","description":"","parent":84,"count":133,"filter":"raw"}],"soil_ph":[{"term_id":109,"name":"Acidic Soil","slug":"acidic-soil","term_group":0,"term_taxonomy_id":109,"taxonomy":"category","description":"","parent":108,"count":148,"filter":"raw"},{"term_id":110,"name":"Neutral Soil","slug":"neutral-soil","term_group":0,"term_taxonomy_id":110,"taxonomy":"category","description":"","parent":108,"count":158,"filter":"raw"}],"soil_type":[{"term_id":145,"name":"Well drained","slug":"well-drained","term_group":0,"term_taxonomy_id":145,"taxonomy":"category","description":"","parent":101,"count":18,"filter":"raw"}],"sun_exposure":[{"term_id":98,"name":"Partial","slug":"partial","term_group":0,"term_taxonomy_id":98,"taxonomy":"category","description":"","parent":96,"count":126,"filter":"raw"},{"term_id":99,"name":"Shade","slug":"shade","term_group":0,"term_taxonomy_id":99,"taxonomy":"category","description":"","parent":96,"count":6,"filter":"raw"}],"usda_hardiness_zones":"Zone: 4 - 9","region_or_country_of_origin":"Northern Asia, Europe; has naturalized in Eastern North America","plant_mature_size":"
Height<\/strong>: 12-24 in. tall<\/p>\n Wide<\/strong>: 12-24 in.<\/p>\n <\/p>\n"},"_links":{"self":[{"href":"https:\/\/freeflowerbulbs.com\/plants\/wp-json\/wp\/v2\/posts\/781","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/freeflowerbulbs.com\/plants\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/freeflowerbulbs.com\/plants\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/freeflowerbulbs.com\/plants\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/freeflowerbulbs.com\/plants\/wp-json\/wp\/v2\/comments?post=781"}],"version-history":[{"count":1,"href":"https:\/\/freeflowerbulbs.com\/plants\/wp-json\/wp\/v2\/posts\/781\/revisions"}],"predecessor-version":[{"id":783,"href":"https:\/\/freeflowerbulbs.com\/plants\/wp-json\/wp\/v2\/posts\/781\/revisions\/783"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/freeflowerbulbs.com\/plants\/wp-json\/wp\/v2\/media\/782"}],"wp:attachment":[{"href":"https:\/\/freeflowerbulbs.com\/plants\/wp-json\/wp\/v2\/media?parent=781"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/freeflowerbulbs.com\/plants\/wp-json\/wp\/v2\/categories?post=781"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/freeflowerbulbs.com\/plants\/wp-json\/wp\/v2\/tags?post=781"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}