If visiting Ha Giang in late autumn (typically October-November), witness the stunning sight of hillsides covered in blooming buckwheat flowers (hoa tam giác mạch). These tiny flowers create vast carpets of pink, purple, and white across the valleys and slopes, particularly around areas like Dong Van, Lung Cu, and Sung La.

The Ha Giang buckwheat flower season is a major draw for photographers and visitors seeking unique natural beauty. Check locally for the exact blooming times each year.