Reasons why you don't use ice cubes:
Phalaenopsis are tropical plants and need water of around 80-90 degrees. Not ice water. It can damage roots
Phalaenopsis roots penetrate deep within their pot or basket. Watering with ice cubes does not allow the water to penetrate deep enough to reach all the roots. This can lead to root loss.
If you fertilize your Phalaenopsis, using ice cubes does not distribute fertilizer at all. It remains concentrated in the upper level of the media. This can burn and injure roots leading to root loss.
Bottom line: most experts agree that a good and healthy root system is the key to successful orchid growing. Watering using ice cubes DOES NOT promote good root growth!
