Ageratum houstonianum

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Ageratum houstonianum
Light:Full Sun
Moisture:Xeric Mesic
Hardiness:8
Soil pH:5.6-8.4
Height:1'
Width:1'
Blooms:Early Summer-Mid Fall
Native to:
Medicinal Rating:
Tea:Yes
Poisonous

Ageratum houstonianum (common name: ageratum)

Propagation: Seed - surface sow March in a light position in a greenhouse. The seed usually germinates in 1 - 3 weeks at 20°c[1]. When large enough to handle, prick the seedlings out and plant them out after the last expected frosts.

Cultivation: Grows well in ordinary garden soil[2]. Requires a sheltered position in full sun[2].

This species is not hardy in the colder areas of the country, it tolerates temperatures down to between -5 and -10°c[2].

A very ornamental plant[3], the flowers are very attractive to butterflies[4].

The removal of dead flowers will extend the flowering season.

Range: South-western N. America - Mexico. An occasional garden escape in Britain[5].

Habitat: Pine woods and cultivated ground[6].

Medicinal: The juice of the plant is used externally to treat cuts and wounds[7].

Pollinators: Lepidoptera

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

Seed Ripens: Late Summer-Mid Fall

Flower Type: Hermaphrodite

Also Known As: A. caeruleum. A. mexicanum.

Links

References

  1. Rice, Graham. Growing from Seed Volume 1. Thompson and Morgan, 1987.
  2. 2.0 2.1 2.2 Huxley, Anthony. The New Royal Horticultural Society Dictionary of Gardening. MacMillan Press, 1992.
  3. Chittendon, Fred. RHS Dictionary of Plants. Oxford University Press, 1951.
  4. Carter, David. Butterflies and Moths in Britain and Europe. Pan, 1982.
  5. Clapham, Arthur and Tom Tootin, Edmund Warburg. Flora of the British Isles. Cambridge University Press, 1962.
  6. Small, John. Manual of the Southeastern Flora. Blackburn Press, 2004.
  7. Manandhar, Narayan. Plants and People of Nepal. Timber Press, 2002.