This is a highly desired color variant of the deciduous species Catasetum expansum, currently native to Ecuador. It is known for its large, waxy, and often highly fragrant flowers that can be yellow with bold burgundy spotting. Like all Catasetum, it has a dramatic annual cycle with a pronounced winter dormancy.
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Light: Thrives in very bright light, around 32,250-64,500 lux. It tolerates more direct sun than most orchids but needs protection from intense midday rays. Increased light is especially important during its leafless dormancy.
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Temperature: Warm growing conditions. The ideal day range during active growth is 65-95°F (18-35°C). Night temperatures should remain above 60°F (16°C), and never drop below 50°F (10°C).
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Humidity: Moderate to high (40-80%) is preferred during the active growing season. Excellent air movement is mandatory, especially with high heat and humidity, to prevent rot and spotting.
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Watering: This is a deciduous orchid with a distinct wet/dry cycle.
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Active Growth: Water heavily and frequently (almost daily) as soon as the new roots are 3−5 inches long.
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Dormancy: When leaves turn yellow and drop, cease watering and fertilizing entirely. Only lightly rehydrate the pseudobulbs if they shrivel severely.
Additional Notes
Catasetum expansum flowers are large (3-4"), waxy, and fragrant, appearing on long spikes in the fall. They are unique for producing separate male and female flowers, which are often determined by the environment.
