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Dracocephalum ruyschiana

Dracocephalum ruyschiana

Common name dragonhead
Family lamiaceae
Life cycle perennial (Z5-8)
Flowers blue (spring-summer)
Size 12"
Light full sun-part shade
Cultural notes well-drained garden soil
From seed germinates at room temperature; exposure to light increases germination
detailed seed-starting info below
Seed ripensearly August

Refined little plant with hooded blue flowers.


This plant used to grow in our garden, but it slipped away...

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Seed-starting details for this plant

  1. Seed from HPS/MAG '01/'02 exchange. Baggy 70F (11%G, 10-20d)
  2. Same seed as above. Baggy 70F (10%G, 9d). Exposure to light afterwards did not increase germination
  3. Seed from '03 garden. Baggy 70F (40%G, 7-19d); to light exposure after 30d (+12%G, 3-9d)
  4. Seed from '04 garden. Baggy 70F with light (20%G, 21-30d) - 70F no light (+25%G, 9-14d)
  5. Seed from '06 garden. Baggy 70F (11d; 7%G, 5-11d) - 70F with light (30d; 3%G, 3d)
  6. Seed from '07 garden. Baggy 70F (67%G, 5-31d)
  7. Seed from HPS/MAG '09/'10 exchange. Baggy 70F (9d; 7%G, 5d) - 70F with light (18d; 14%G, 6d)
  8. Seed from NARGS '11/'12 exchange. Baggy 70F (33%G, 15-46d)
  9. Seed from HPS/MAG '13/'14 exchange. Baggy 70F (3%G, 23d)

Light sensitivity still not clear. Always more difficult to germinate than the annual D. moldavicum.

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common mis-spellings: ruyschianum

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Last modified: March 30, 2014
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