Answer: The most common reason for any orchid not to bloom is insufficient light. Move your phalaenopsis plants to a window where they will receive strong, but indirect light (near a south-facing window is ideal). You might also try lighting your plants with a fluorescent light fixture placed about 1-2 feet above the foliage. Give up to 12 hours of supplemental light per day. Phalaenopsis will also develop flower spikes in response to a cool period of about four weeks with night temperatures of 55F. After the cool treatment, raise the night temperature back to the normal 60-65F minimum. See if these changes to your growing conditions help to stimulate your plants to bloom. I hope so!
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