Apparently it’s rare to have a Petra Croton (Codiaeum variegatum ‘Petra’) bloom indoors. The required environmental conditions include bright, indirect light, high humidity and consistently moist growing medium. This Petra always faces North, so the light it receives is not bright. It has a relatively dry (heat pump) environment, often goes for long periods without watering, and receives no fertilizer. But it bloomed. It’s like something from another planet.