In general, water once a week during the winter and twice a week when the weather turns warm and dry. The size of your orchid container also helps determine how often you need to water, regardless of climate conditions. Typically, a 6-inch pot needs water every 7 days and a 4-inch pot needs water every 5 to 6 days.
How do I know when to water my orchid?
In general, orchids like their growing medium to dry out between waterings. To test this, put a finger in the growing medium. If it's dry about an inch (2.5 cm.) down, it's time for watering.
Should you water orchids while blooming?
Regularly water orchids that are blooming, growing new roots, or new leaves. While some orchids such as Cattleyas and Dendrobiums like to dry out between watering, others such as Phalaenopsis and Paphiopedilums like to remain evenly moist.