Ageratum houstonianum - Ageratum
Famille: Compositae, Genre: Ageratum
Annuelle (0.3m de haut par 0.3m de large).
Habitat
- Exposition
- Plein soleil
- Humidité
- Sol sec à moyen.
- Sol
- Tous sols.
- pH
- Sol acide ou calcaire
- Rusticité
- Zone 8
- Habitat originel
- Pine woods and cultivated ground[72].
- Origine géographique
- South-western N. America - Mexico. An occasional garden escape in Britain[17].
Culture
- Grows well in ordinary garden soil [200].
- Requires a sheltered position in full sun [200].
- Cette espèce n'est pas suffisamment robuste pour les régions les plus froides d'Angleterre, elle tolère des températures jusqu'à -5 à -10°C [200].
- A very ornamental plant[1], the flowers are very attractive to butterflies [30].
- The removal of dead flowers will extend the flowering season .
Propagation
- Seed - surface sow March in a light position in a greenhouse .
- The seed usually germinates in 1 - 3 weeks at 20°c [133].
- When large enough to handle, prick the seedlings out and plant them out after the last expected frosts .
Calendrier
- En fleur
- 6 - 10
- Maturité des graines
- 8 - 10
Pollinisation
- Type de fleur
- Hermaphrodite (les fleurs ont des organes mâles et femelles)
- Auto-fertile
- Non
- Pollinisateurs
- Lepidoptera
Divers
- Pollution
- Non
- Autres réferences
- [72, 200]
Réferences
[30] Butterflies and Moths in Britain and Europe. 1982.
An excellent book on Lepidoptera, it also lists their favourite food plants.
An excellent book on Lepidoptera, it also lists their favourite food plants.
[72] Manual of the Southeastern Flora.
Getting rather dated now, it covers Southeastern N. America. No pictures, it is not for the casual reader.
Getting rather dated now, it covers Southeastern N. America. No pictures, it is not for the casual reader.
[133] Growing from Seed. Volume 1. 1987.
Very readable magazine with lots of information on propagation.
Very readable magazine with lots of information on propagation.
[200] The New RHS Dictionary of Gardening. 1992. 1992.
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
Excellent and very comprehensive, though it contains a number of silly mistakes. Readable yet also very detailed.
[272] Plants and People of Nepal 2002.
Excellent book, covering over 1,500 species of useful plants from Nepal together with information on the geography and peoples of Nepal. Good descriptions of the plants with terse notes on their uses.
Excellent book, covering over 1,500 species of useful plants from Nepal together with information on the geography and peoples of Nepal. Good descriptions of the plants with terse notes on their uses.
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