Not enough light or no cool-night trigger

What's happening

Phalaenopsis needs steady bright, indirect light to fuel blooming, and a new flower spike is triggered by a stretch of cooler nights — roughly 55–65°F for two to four weeks in fall. Dark green, floppy leaves are a tell-tale sign of too little light, and a plant kept at constant warm room temperature year-round often never gets the cool-night signal to spike.

How to fix it

First, brighten its spot — an east window or a few feet from a bright south/west window, aiming for medium grassy-green leaves rather than dark green. Then give it a cool-night trigger in fall: place it where nights drop to around 55–65°F for two to four weeks, such as near a cooler window, while keeping daytime warmth and bright light. Feed with a dilute orchid fertilizer through the growing season to fuel the spike once it forms.

This is general guidance based on common symptoms; individual plants vary.