In Haimchar upazila of Chandpur, cultivation of black cumin on previously fallow char lands has opened new opportunities for local farmers. Due to low production costs and high profitability within a short period, black cumin is now being called the 'black diamond' by farmers. According to the upazila agriculture office, cultivation has expanded from just one hectare last year to 18 hectares this year.

Farmers are growing the crop on sandy-loam soils after the rice harvest, supported by two government projects: the Modern Agricultural Technology Expansion Project in Bangladesh’s Char Areas and the Sustainable Agricultural Technology Expansion Project in the Cumilla region. These initiatives provide materials and technical assistance to farmers.

Officials noted that the soil’s pH level of 6.5 to 7.0 is ideal for black cumin cultivation. The Deputy Director of the Department of Agricultural Extension in Chandpur expressed optimism that with proper marketing systems, Haimchar could become a major production hub for black cumin in the future.