You should water your Phalaenopsis orchid once a week. The best way to do so is to dunk the whole pot into a sink or bowl of water. If you have time, leave the pot submerged for a few minutes — this will allow the root system to absorb all the water it needs. Alternatively, run the pot under a tap for around 20 seconds, allowing water to drain through the bottom. You’re fine to use tap water, even if you live in an area with very hard water — Phalaenopsis orchids are extremely versatile and will adapt to any water source. Don’t leave the roots standing in water for long periods of time, as they will most likely rot
Did you know? If you can’t remove your plant from its decorative container, you can keep it watered by placing one or two ice cubes at the base of its stem once a week.