Yes, turmeric flowers are considered rare. They are a secondary crop from the turmeric plant and are primarily gathered seasonally from wild or home garden plants, especially in Southeast Asia.
While turmeric root (rhizome) is widely cultivated for its culinary and medicinal uses, the flowers are not commercially cultivated and are therefore less commonly seen. This limited availability makes them a relatively rare find compared to the turmeric spice itself.
Therefore, if you're seeking turmeric flowers specifically, you're likely to encounter them less frequently than the more common turmeric rhizome.