Description and general information
Dracocephalum heterophyllum , also known as white dragonhead, forms a somewhat mounding plant 10-15 cm (rarely to 30 cm) with round to spoon-shaped, stiffly hairy leaves. The leaf edges have shallow, rouned teeth and the leaves emit a pleasant fragrance when bruised. Flowers are produced in relatively large round to cylindrical heads at the ends of the semi-prostrate stems.
This Dracocephalum inhabits mountain meadows and barren slopes and screes at elevations of 1100-5000 m. It is a wide-ranging species native to the Himalayas of China, Sikkim, Nepal, SE Tibet, Soviet central asia, Pakistan and NE Afghanistan.
Cultivation
This species requires well-drained soil and full sun. They are very drought tolerant but do not like winter-wet. It is hardy to zone 3 (it is known to survive in Calgary, Alberta).
Bloom period
Mostly June through August but as early as May in mild regions.
Propagation
Seed, division and cuttings.
Seed
Sow seed at 15-20°C. If germination does not occur within 4 weeks, chill them at 4°C for 4 weeks.
Division
Division of larger plants in spring or autumn.
Cuttings
Basal cuttings may be taken when the new growths are a few centimetres long (April/June).