Vandaceous orchids like day temperatures between 75-95 F and preferably not lower than 55 F at night. Higher temperatures are best for flowering. They can tolerate long, hot spells and short cold spells. Vandaceous orchids like high humidity. Good air movement is important during warm weather.
Vandas are heavy feeders and require large amounts of fertilizer.
Outdoor plants may require a stronger concentration. During the winter, you can fertilize every 2 weeks. An occasional vitamin or bloom booster stimulates growth. Flush or water plants in between feedings to remove an accumulation of fertilizer salts. It is important to develop a regular feeding schedule.