The northern province of Nam Định is famed for its salt producing villages in Hải Hậu, Giao Thủy and Nghĩa Hưng districts.
The price of salt has risen this year but middlemen, rather than farmers, have benefitted.
Salt farmers in many localities are facing poor crops due to unfavourable weather conditions.
On the domestic market, salt price has been on the rise for a few consecutive days, while many salt farmers express their dissatisfaction at having ran out of salt supply during the price hike.
The salt price in the Cửu Long (Mekong) Delta province of Bạc Liêu has increased two to three times compared to last year, according to local farmers.