Rob's plants home garden plants wildlife seed photos plant sale journal topics plantlinks fun guestbook Polemonium caeruleum subsp. villosum 'Blue master'

 

Common name Jacob's ladder Family polemoniaceae Life cycle perennial Flowers blue Size to 12" Light full sun-part shade Cultural notes ordinary garden soil, not too dry From seed germinates at room temperature detailed seed-starting info below Seed ripens early July This strong-growing Jacob's ladder has been much sturdier and more reliable in our garden than the common Jacob's ladder. It has similar delicate compound foliage, and blue flowers. For years I had this mis-identified as P. pulcherrimum, but I was recently set straight by a UK expert. The yellow anthers, and taller growth, put this squarely into the caeruleum camp. Relative to the plain species, subsp. villosum has fewer leaves along the flowering stems.

Amazingly popping-green foliage in early April

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

2003. Seed from '02 trade. Baggy with light. 70F (68%G, 4-12d)
2004. Same seed as above. Baggy with light. 70F (84%G, 6-9d)
2006. Seed from '05 garden. Baggy 70F with light (58+%G, 4-10d)
2008. Seed from '06 garden. Baggy 70F with light (50%G, 6-11d)
2009. Seed from '06 garden. Baggy 70F (4%G, 19d) - 70F with light (no further G).
      Also seed from '07 garden. Baggy 70F (50%G, 7-12d) - 70F with light (no further G).
2011. Seed from '10 garden. Baggy 70F (55+%G, 3-8d)

Light may not be necessary. Seed has limited viability, apparently approximately 2 years.

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