Read more of Cultivation of Angraecum humbertii H.Perrier,
Culture:
Light:
2000-3000 fc. Light should be filtered or diffused, and plants should not be exposed to direct midday sun. Strong air movement should be provided at all times.
Temperatures:
Summer days average 85-86F (29-30C), and nights average 65-66F (18-19C), with a diurnal range of 20-21F (11-12C).
Humidity:
70-75% in summer and autumn, dropping to 60-65% for about 3 months in late winter and early spring.
Water:
Rainfall is moderate to heavy from late spring to early autumn. Averages then drop rather abruptly in midautumn at the beginning of the dry season, that lasts about 5 months until late winter or early spring. Cultivated plants should be watered heavily while actively growing, but drainage must be excellent. Water should be reduced in autumn after new growths mature.
Fertilizer:
1/4-1/2 recommended strength, applied weekly when plants are actively growing. Many growers prefer to use a balanced fertilizer throughout the year; but others use a high-nitrogen fertilizer from spring to midsummer, then switch to one high in phosphates in late summer and autumn.
Rest period:
Winter days average 75-78F (24-26C), and nights average 53-54F (12C), with a diurnal range of 22-25F (12-14C). Rainfall in the habitat is low from autumn to early spring. Humidity remains relatively high throughout the year, however, so considerable additional moisture is available from heavy dew and late-night mist. Cultivated plants need much less water in winter, but plants should not be completely without water for long periods. Occasional early-morning mistings between infrequent light waterings should be adequate in most growing areas. Water should be increased somewhat if leaves shrivel or show signs of stress. It is interesting to note that Hillerman & Holst (1986) reported "while it comes from areas having a long dry season, it seems to flower quite well without any pronounced dryoff period." Fertilizer should be eliminated until new growth starts and heavier watering is resumed in spring.
Growing media:
Hillerman & Holst (1986) reported that these plants grow better if mounted on slabs, but they may be potted if care is used. If mounted, high humidity must be maintained and the plants watered at least daily during hot, summer weather. If potted, a very open, fast draining medium such as medium to large fir bark or cork nuggets is recommended. Undersized pots large enough to hold the roots should be used, and repotting should be done just as new root growth is starting, or as soon after flowering as possible.
Miscellaneous notes:
Long blooming and frequent blooming orchid species.
References:
This information is quoted from a Charles and Margaret Baker culture sheet, with permission from Troy Meyers
