The rule of thumb for watering Vanda Orchids, should be as followed : More heat more water, less heat less water!
Depending upon the temperature, Vandas grown in pots should be watered about once or twice a week. During the summer, the plants may need to be watered every 4-5 days.
Vandas grown in baskets require watering often. Plants need to be watered daily during the summer.
Vandas should dry out in between watering. Try to water the plants early in the day, so that the foliage will be dry by nightfall. To prevent bacterial and fungal disease use Physan 20, once a month.
