Brassia's should be treated like cattleyas, (bright light and high temperatures) but they should not be allowed to dry out completely when they are actively growing.
Tips for Success: Brassia’s will grow well in any standard, all-purpose orchid bark mix or Growing Medium. Young plants may benefit from being transplanted yearly to one size or two larger each time. Propagate Brassias by dividing the psuedobulb after flowering. After the first flowering, repotting may not be needed.
Approximately every two years (before the growing medium begins to decompose) is a good rule to follow. If growing outdoors, brassias require a little less light. Indoors, they are suited to a half-sunny window, such as one receiving direct sun from the east or south, perhaps a little more shade if from a hot, western sun. Under lights, brassias can be accommodated under banks of four to six 40 or 74 watt tubes burned 16 hours out of every 24. Be sure the brassias do not dry out severely between waterings. When grown with a steady hand, they are capable of having beautiful foliage that rises above the smooth, green pseudobulbs. The effect can be enhanced by cleaning the leaves and pseudobulbs of any spray or hard water residue by using fresh lemon juice. This gives them a natural, attractive sheen.