Delphinium caeruleum

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Delphinium caeruleum
Light:Full Sun
Moisture:Mesic
Hardiness:7
Soil pH:5.6-8.4
Height:1'
Width:1'
Blooms:Mid Summer-Late Summer
Native to:
Medicinal Rating:
Tea:Yes
Poisonous

Delphinium caeruleum

Propagation: Seed - sow March/April in a cold frame or May outdoors[1]. Keep moist and in a shady position until germination takes place[2]. The seed has a limited viability so it should be stored in a sealed container at about 3°c[3]. Temperatures above 15°c inhibit germination[2]. The seed usually germinates in 2 - 9 weeks at 15°c[2]. When they are large enough to handle, prick the seedlings out into individual pots and plant them out into their permanent positions in the summer.

Cuttings of basal shoots in April/May, taken before they become hollow at the base, and planted in a cold frame[1].

Division in spring[1] or early autumn[3].

Cultivation: Prefers a rich well-drained soil that stays moist in the summer[1][4]. Dislikes water-logged soils[3], it is liable to die out in heavy soils over winter[1]. Requires an open sunny position[5].

A greedy plant, inhibiting the growth of nearby plants, especially legumes[6].

Range: E. Asia - Himalayas from Kumaon to Sikkim.

Habitat: Alpine areas from 2500 to 5000 metres[7].

Medicinal: The roots have been used to kill maggots in the wounds of goats[7].

Usage: A parasiticide is obtained from the leaves and roots[8][9]. It is quite toxic and so is for external use only.

Soil: Can grow in light, medium, and heavy soils.

Drainage: Prefers well drained soil.

Seed Ripens: Mid Summer-Late Summer

Flower Type: Hermaphrodite

Known Hazards: All parts of the plant are toxic[10][11]. The plant is most toxic when it is young[3].

Links

References

  1. 1.0 1.1 1.2 1.3 1.4 Sanders, Thomas. Popular Hardy Perennials. Collingridge, 1926.
  2. 2.0 2.1 2.2 Bird, Alfred. Focus on Plants Volume 5. Thompson and Morgan, 1991.
  3. 3.0 3.1 3.2 3.3 Huxley, Anthony. The New Royal Horticultural Society Dictionary of Gardening. MacMillan Press, 1992.
  4. Phillips, Roger and Martyn Rix. Perennials - The Definitve Reference. Pan Books, 1991.
  5. Brickell, Christopher. The RHS Gardener's Encyclopedia of Plants and Flowers. Dorling Kindersley Publishers, 1990.
  6. Hatfield, Audrey. How to Enjoy your Weeds. Frederick Muller Ltd, 1974.
  7. 7.0 7.1 Chopra, R. Glossary of Indian Medicinal Plants. Council of Scientific and Industrial Research, New Delhi, 1986.
  8. Polunin, Oleg and Adam Stainton. Flowers of the Himalayas. Oxford Universtiy Press, 1984.
  9. Usher, George. A Dictionary of Plants Used by Man. Constable, 1974.
  10. Frohne, Dietrich and Hans Pfänder. J. A Colour Atlas of Poisonous Plants. Timber Press, 1984.
  11. Schofield, Janice. Discovering Wild Plants.