There are so many different types of orchids and they also consume different quantities of water. Some store it in pseudobulbs while others have a more typical root system. Seasonal factors and the size and growth phase of the individual plant will also determine the amount of water it needs and how quickly it will consume the water you provide. How often you water a particular orchid may change during the course of the year.
There are often visible signs if you are over or under-watering and there are some broad principles that can help you decide how often to water.
Most orchids dislike being permanently soaked or being in a position where their roots are covered with water. The varieties that store water in pseudobulbs may appear to be consuming water faster but in fact, because they