The Catasetum tenebrosum is one of the most impressive species within the Catasetinae, especially loved for its dark-colored flowers that have a mystical, almost dramatic appearance. It is a species that combines strength and elegance, adding a unique accent to any collection with its deep colors.
Catasetum tenebrosum* is native to Ecuador and Peru, where it grows in tropical lowland forests. There it develops as an epiphyte on tree branches, exposed to lots of sunlight and high humidity during the growing season. The name tenebrosum literally means “dark” or “shady,” and refers to the almost black-brown hues of the flowers.
The flowers of Catasetum tenebrosum are large, fleshy and deeply colored – ranging from maroon to almost black, often with a glossy texture. The lip is broad and rounded, giving the flower a powerful, solid impression. A flower cluster can bear several large flowers, making the blooms very imposing. The plant itself forms sturdy, tall pseudobulbs with long, narrow leaves that fall off in autumn to make way for dormancy.
This species likes a lot of light and tolerates even short periods of direct sunlight. A sunny position is ideal to stimulate flowering.
Warm conditions are necessary, preferably 20-30 C with slight nighttime cooling.
An airy and well-draining mixture of coarse tree bark and charcoal is most suitable.
A humidity of 50-70% is sufficient, provided good air circulation is present.
During the growth phase, fertilize generously weekly with a nitrogen-rich fertilizer. Once the pseudobulbs are mature, switch to a phosphorus-rich fertilizer to promote flowering.
Use only demineralized water. Water abundantly during the growing period. As soon as the leaves fall off in autumn, greatly reduce watering and only water minimally in the dormant period to prevent the pseudobulbs from drying out.
The flowering of Catasetum tenebrosum is a true spectacle. With its dark brown to almost black flowers, this is one of the most dramatic-looking species within the genus. For collectors who love bold colors and a mystical look, this is an absolute must-have.
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