CATTLEYA eidorado was looked upon as a difficult cattleya to grow when it was first imported into Europe in the 1870s, and it apparently took growers some time to learn its requirements.
Because Cattleya eidorado is a native of the hot tropical forests at sea level in Brazil, it requires more heat than the typical mountain cloud-forest Cattleya species like Cattleya warscewiczii, Cattleya trianaei and Cattleya mendelii. A night temperature of 68 to 70 F is more to its liking normal 58 to 60F night temperature of most other cattleyas. Caldeya eldorado also needs a clear-cut rest period after flowering and should receive a minimum of water during the winter months when it is essentially dormant,
Cattleya eldorado will begin growing in the late winter and early spring in the United States. As the new growth matures, you should see buds forming in the sheath and the plant should flower in early summer. After it flowers, it will begin to root and can be repotted at this time. After repotting, just enough water should be given to the plants to draw the emerging roots down into the potting medium, if this watering is done carefully, the plants should be well rooted by the time they go into dormancy in the autumn. Cattleya eldorado benefits from a hot, humid atmosphere when it is actively growing in spring and early summer. It performs best when given lots of sun and air at all times of the year. It must have a dry period while it is resting during the fall and early winter if you want it to thrive. —A.A. Chadwick
Reprinted with the permission of the American Orchid Society. “Orchids”, June 2002