Coriander in Beijing's Xinfadi Market mainly comes from Hebei production areas, with an additional smaller volume from the northeast. Shouguang is not a major supplier of coriander to the Beijing market at all. The reason for the price increase is that coriander does not thrive when temperatures are high and rainfall is excessive, and these were exactly the weather conditions in recent weeks.
In general, farmers can earn more profit from planting coriander than they can from corn or wheat, but the investment is also large and the labor cost is higher. Furthermore, farmers cannot plant coriander in the same field every year. This year the market price is good, but the production volume is low, and farmers find it difficult to obtain a profit under these conditions. The production volume will increase as autumn sets in, and this will limit the price increase of coriander.
Source: baijiahao.baidu.com