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Polemonium caeruleum ssp. yezoense

Polemonium caeruleum ssp. yezoense
Jacob's ladder
Polemonium caeruleum ssp. yezoense

Synonym(s) Polemonium yezoense
Common name Jacob's ladder
Family polemoniaceae
Life cycle perennial (Z4-8)
Flowers blue (mid-spring)
Size 18-24"
Light sun-part shade
From seed germinate at room temperature
detailed seed-starting info below

Subspecies of the common Jacob's ladder (formerly considered a separate species) that is native to Japan. Known for several named purple-leaved varieties, but the version I grew from seed has dark green leaves. Large (for a polemonium) clear blue flowers in mid-May.

We left this plant behind in our Pennsylvania garden (and wish it well); we don't grow it in Houston.

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Seed-starting details for this plant

  1. Seed from NARGS '12/'13 exchange. Baggy 70F (43%G, 5-7d)
  2. Seed from NARGS '13/'14 exchange. Baggy 70F (60%G, 8-21d)

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