Softening or wrinkling of the lower leaves indicates the plant is under watered, so increase your watering frequency when this occurs. Remember to water the aerial roots as well. During cooler weather you can reduce the watering frequency. Vandas like warm weather so they are the perfect plant for South Florida. 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.