Cattleyas, the royalty of the orchid family, are native to the slopes of the Andes in South America. On the mountain slopes they have moderate days and cool nights, so they appreciate a temperature drop in the evening. They are comfortable at temperatures as low as 55 degrees at night, with days in the 70's or higher. They need bright light (not full sun) to flower. They must have good drainage, and like to dry a bit between waterings. Fertilize lightly when they are in active growth. Repot in a well draining mix, like our Cypress blends, when they have outgrown the pot or the mix has broken down (every two or three years).