The genus Angraecum counts about two hundred species of orchids, native to southern Africa, spread mainly in Madagascar; they are free of pseudobulbs, epiphytes, and have various dimensions, some species are almost in miniature, others have vigorous plants and very big flowers. The flowers are candid white, at times greenish or suffused with yellow or pink.
Angrecum sesquipedale has white flowers, star-shaped, very big; at the base of the corolla develops a long spur, which can reach the 25-30 cm of length. This orchid was discovered by C. Darwin in the mid-1800s. It has long fleshy leaves, which grow evenly along the vigorous stem, the plants of Angraecum sesquipedale can reach 30-40 cm high. The flowers are very fragrant, especially during the evening hours. The plants tend to develop long aerial roots, silver-green in colour.
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Angraecum sesquipedale prefer very bright positions, but away from direct sunlight, at least during the hottest hours of the day and in summer; they can also be kept on the windowsill, taking care to screen the sunlight with a clear curtain. They fear the cold, and prefer night-time temperatures over 15°C. In summer it is advisable to leave them in a shady, well ventilated and fairly cool place, trying to avoid prolonged exposure to temperatures well above 35 ° C.
- Some species of orchids have very special flowers, with a curved labellum, closed to form a kind of shoe; orchids with cup-shaped lips belong to three main genus of orchids.
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Angrecum orchids do not have a real rest period, so they water regularly throughout the year, keeping the substrate slightly moist. However, make sure that the substrate is not too soggy as dangerous root rot can quickly occur.
After flowering, the watering is slightly reduced, for about a couple of months. During the period of vegetative development and production of the flowers, a specific fertilizer for orchids is provided, in a halved dose, every 20-25 days.
Like many other epiphytic orchids, also the Angraecum sesquipedale are cultivated in small containers, filled with shredded bark, small pieces of polystyrene, perlite, and other incoherent materials, suitable for simulating the soil in which they develop in the forests of Madagascar.
These plants should be repotted when the roots are now forced into the pot, taking care to use a pot only slightly larger than the previous one. To avoid problems with this operation, it is advisable to wet the roots, so that they are less fragile.
At home, the Angrecum multiply by taking in April May the shoots that are at the foot of the plant or on top of the old stems. The cuttings are rooted in a compound similar to that in which the mother plant lives, trying to keep them at a temperature of about twenty degrees, and then transplant. The stem of A.
sesquipedale sometimes tends to stretch excessively, in this case it is possible to cut the apex and place it in a single container, taking care to leave some roots to each portion practiced.
Angrecum – Angraecum sesquipedale: Pests and diseases
The red spider produces yellow spots on the leaves; it is possible to combat the problem by spraying water on the plants, as humidity is an enemy of these parasites.
They can also present problems due to unfavourable environmental conditions, such as poor lighting or too low temperatures.