Dendrobium aggregatum is native to the Himalayas, Burma, Indochina, and the Malay peninsula. The first time I saw these orchids in bloom, they reminded me of pansies. The small pseudobulbs are 2 inches long with 1 leaf to 3 inches long.
Blooming Time: Spring Flowers are in racemes with 3 to 12 flowers. They are golden yellow with the lip deeper colored. Flowers are 1½ inches across and are lightly scented.
Culture: Dendrobium aggregatum are bulbous plants with a pendent inflorescence. They grow best on slabs of cork or tree fern fibre, but they can be grown in pots or wooden baskets. If grown in pots, the compost should consist of osmunda fibre and sphagnum moss or similar ingredients. In the summer give the plants plenty of warmth (60-90 degrees) with plenty of light, usually about 40-50% shade. Water every other day, fertilize weekly with a 30-10-10 fertilizer diluted to ½ the strength recommended on the label. In winter, they like cool nights (about 50 degrees) with medium light and just enough water to keep the pseudobulbs from shriveling. Do not fertilize in winter.
Propagation: Dendrobium aggregatum are propagated by division of pseudobulbs.
Dendrobium aggregatum was featured as Plant of the Week March 17-23, 2000.
Guide to Past Plants-of-the-Week:
Cal's Plant of the Week was provided as a service by the University of Oklahoma Department of Microbiology & Plant Biology and specifically the late Cal Lemke, who used to be OU's botany greenhouse grower and an avid gardener at home as well. If the above links don't work, then try the overview site. You may also like to look at the thumbnail index. ©1998-2012 All rights reserved.