The plants of allamanda cathartica cannot stand temperatures below 3-4°C for prolonged periods, therefore usually they are cultivated as apartment plants; in regions with very mild winters they can be used as garden shrubs, locating them in a place sheltered from wind and cold.
To obtain an abundant flowering, it is necessary that these plants are placed in a very luminous place, which is hit directly by the sun rays for at least 3-4 hours a day, but not during the hottest hours, therefore better the morning or late afternoon sun.
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During the cold months the cathartic almadas water in moderation, avoiding soaking the soil too much; from March to October water regularly and abundantly, avoiding water stagnations that are very harmful to this type of plant, but checking that the soil maintains the right degree of moisture. Every 15-20 days provide fertiliser for flowering plants. In autumn, after flowering, prune the branches too long to obtain a more compact shrub.
To have a good development of the specimens of this type, it is advisable to cultivate in a good soil rich in organic matter, slightly acidic, very well drained; to increase the drainage it is advisable to add to the soil of our pots a good part of pumice stone or lapillus.
This plant is repotted annually in early spring until you get to use a pot of about 50 cm, at this point, every year it is good to intervene by removing the surface layer of the soil and replace it with a compound rich in organic matter.
The multiplication of the cathartic almanda takes place by seed, at the end of winter, or by cutting, in autumn or spring. The cuttings are to be placed in containers where a mixture of peat and sand has been placed; these are then to be placed in a sheltered and protected place where the temperature is to be kept constantly around the 22 °C.
Allamanda cathartica: Pests and diseases
These climbing plants can be attacked by cochineal and red spider webs. The attack of the cochineal is very recognizable, due to the presence of formations that look like cotton flakes; if the presence is contained, it is possible to intervene through manual elimination with a cloth soaked in alcohol or washing the plant with water and soap, to be then rinsed with great care. Otherwise, if the presence of cochineals is massive, it is better to use a specific product to vaporize on the plant.
To eliminate the red spider mite it may be sufficient to increase the ambient humidity and vaporize water on the leaves.
- The Allamanda is the name of a beautiful plant and very popular because it is excellent for decorating balconies, verandas and gardens.
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